11 files changed, 287 insertions, 70 deletions

diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt
index f0a6753a9..b1771b424 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt
@@ -27,13 +27,13 @@ import android.view.MotionEvent
 import android.view.Surface
 import android.view.View
 import android.view.inputmethod.InputMethodManager
+import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
 import androidx.navigation.fragment.NavHostFragment
-import kotlin.math.roundToInt
 import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.R
 import org.yuzu.yuzu_emu.databinding.ActivityEmulationBinding
@@ -44,8 +44,10 @@ import org.yuzu.yuzu_emu.model.Game
 import org.yuzu.yuzu_emu.utils.ControllerMappingHelper
 import org.yuzu.yuzu_emu.utils.ForegroundService
 import org.yuzu.yuzu_emu.utils.InputHandler
+import org.yuzu.yuzu_emu.utils.MemoryUtil
 import org.yuzu.yuzu_emu.utils.NfcReader
 import org.yuzu.yuzu_emu.utils.ThemeHelper
+import kotlin.math.roundToInt
 
 class EmulationActivity : AppCompatActivity(), SensorEventListener {
     private lateinit var binding: ActivityEmulationBinding
@@ -102,6 +104,19 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
         inputHandler = InputHandler()
         inputHandler.initialize()
 
+        val memoryUtil = MemoryUtil(this)
+        if (memoryUtil.isLessThan(8, MemoryUtil.Gb)) {
+            Toast.makeText(
+                this,
+                getString(
+                    R.string.device_memory_inadequate,
+                    memoryUtil.getDeviceRAM(),
+                    "8 ${getString(R.string.memory_gigabyte)}"
+                ),
+                Toast.LENGTH_LONG
+            ).show()
+        }
+
         // Start a foreground service to prevent the app from getting killed in the background
         val startIntent = Intent(this, ForegroundService::class.java)
         startForegroundService(startIntent)
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/LongMessageDialogFragment.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/LongMessageDialogFragment.kt
new file mode 100644
index 000000000..b29b627e9
--- /dev/null
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/LongMessageDialogFragment.kt
@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.yuzu.yuzu_emu.fragments
+
+import android.app.Dialog
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import androidx.fragment.app.DialogFragment
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import org.yuzu.yuzu_emu.R
+
+class LongMessageDialogFragment : DialogFragment() {
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val titleId = requireArguments().getInt(TITLE)
+        val description = requireArguments().getString(DESCRIPTION)
+        val helpLinkId = requireArguments().getInt(HELP_LINK)
+
+        val dialog = MaterialAlertDialogBuilder(requireContext())
+            .setPositiveButton(R.string.close, null)
+            .setTitle(titleId)
+            .setMessage(description)
+
+        if (helpLinkId != 0) {
+            dialog.setNeutralButton(R.string.learn_more) { _, _ ->
+                openLink(getString(helpLinkId))
+            }
+        }
+
+        return dialog.show()
+    }
+
+    private fun openLink(link: String) {
+        val intent = Intent(Intent.ACTION_VIEW, Uri.parse(link))
+        startActivity(intent)
+    }
+
+    companion object {
+        const val TAG = "LongMessageDialogFragment"
+
+        private const val TITLE = "Title"
+        private const val DESCRIPTION = "Description"
+        private const val HELP_LINK = "Link"
+
+        fun newInstance(
+            titleId: Int,
+            description: String,
+            helpLinkId: Int = 0
+        ): LongMessageDialogFragment {
+            val dialog = LongMessageDialogFragment()
+            val bundle = Bundle()
+            bundle.apply {
+                putInt(TITLE, titleId)
+                putString(DESCRIPTION, description)
+                putInt(HELP_LINK, helpLinkId)
+            }
+            dialog.arguments = bundle
+            return dialog
+        }
+    }
+}
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
index cc1d87f1b..3086cfad3 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
@@ -4,6 +4,7 @@
 package org.yuzu.yuzu_emu.ui.main
 
 import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
@@ -42,6 +43,7 @@ import org.yuzu.yuzu_emu.features.settings.model.SettingsViewModel
 import org.yuzu.yuzu_emu.features.settings.ui.SettingsActivity
 import org.yuzu.yuzu_emu.features.settings.utils.SettingsFile
 import org.yuzu.yuzu_emu.fragments.IndeterminateProgressDialogFragment
+import org.yuzu.yuzu_emu.fragments.LongMessageDialogFragment
 import org.yuzu.yuzu_emu.fragments.MessageDialogFragment
 import org.yuzu.yuzu_emu.model.GamesViewModel
 import org.yuzu.yuzu_emu.model.HomeViewModel
@@ -481,62 +483,110 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
             }
         }
 
-    val installGameUpdate =
-        registerForActivityResult(ActivityResultContracts.OpenDocument()) {
-            if (it == null) {
-                return@registerForActivityResult
-            }
-
+    val installGameUpdate = registerForActivityResult(
+        ActivityResultContracts.OpenMultipleDocuments()
+    ) { documents: List<Uri> ->
+        if (documents.isNotEmpty()) {
             IndeterminateProgressDialogFragment.newInstance(
                 this@MainActivity,
                 R.string.install_game_content
             ) {
-                val result = NativeLibrary.installFileToNand(it.toString())
+                var installSuccess = 0
+                var installOverwrite = 0
+                var errorBaseGame = 0
+                var errorExtension = 0
+                var errorOther = 0
+                var errorTotal = 0
                 lifecycleScope.launch {
-                    withContext(Dispatchers.Main) {
-                        when (result) {
+                    documents.forEach {
+                        when (NativeLibrary.installFileToNand(it.toString())) {
                             NativeLibrary.InstallFileToNandResult.Success -> {
-                                Toast.makeText(
-                                    applicationContext,
-                                    R.string.install_game_content_success,
-                                    Toast.LENGTH_SHORT
-                                ).show()
+                                installSuccess += 1
                             }
 
                             NativeLibrary.InstallFileToNandResult.SuccessFileOverwritten -> {
-                                Toast.makeText(
-                                    applicationContext,
-                                    R.string.install_game_content_success_overwrite,
-                                    Toast.LENGTH_SHORT
-                                ).show()
+                                installOverwrite += 1
                             }
 
                             NativeLibrary.InstallFileToNandResult.ErrorBaseGame -> {
-                                MessageDialogFragment.newInstance(
-                                    R.string.install_game_content_failure,
-                                    R.string.install_game_content_failure_base
-                                ).show(supportFragmentManager, MessageDialogFragment.TAG)
+                                errorBaseGame += 1
                             }
 
                             NativeLibrary.InstallFileToNandResult.ErrorFilenameExtension -> {
-                                MessageDialogFragment.newInstance(
-                                    R.string.install_game_content_failure,
-                                    R.string.install_game_content_failure_file_extension,
-                                    R.string.install_game_content_help_link
-                                ).show(supportFragmentManager, MessageDialogFragment.TAG)
+                                errorExtension += 1
                             }
 
                             else -> {
-                                MessageDialogFragment.newInstance(
-                                    R.string.install_game_content_failure,
-                                    R.string.install_game_content_failure_description,
-                                    R.string.install_game_content_help_link
-                                ).show(supportFragmentManager, MessageDialogFragment.TAG)
+                                errorOther += 1
                             }
                         }
                     }
+                    withContext(Dispatchers.Main) {
+                        val separator = System.getProperty("line.separator") ?: "\n"
+                        val installResult = StringBuilder()
+                        if (installSuccess > 0) {
+                            installResult.append(
+                                getString(
+                                    R.string.install_game_content_success_install,
+                                    installSuccess
+                                )
+                            )
+                            installResult.append(separator)
+                        }
+                        if (installOverwrite > 0) {
+                            installResult.append(
+                                getString(
+                                    R.string.install_game_content_success_overwrite,
+                                    installOverwrite
+                                )
+                            )
+                            installResult.append(separator)
+                        }
+                        errorTotal = errorBaseGame + errorExtension + errorOther
+                        if (errorTotal > 0) {
+                            installResult.append(separator)
+                            installResult.append(
+                                getString(
+                                    R.string.install_game_content_failed_count,
+                                    errorTotal
+                                )
+                            )
+                            installResult.append(separator)
+                            if (errorBaseGame > 0) {
+                                installResult.append(separator)
+                                installResult.append(
+                                    getString(R.string.install_game_content_failure_base)
+                                )
+                                installResult.append(separator)
+                            }
+                            if (errorExtension > 0) {
+                                installResult.append(separator)
+                                installResult.append(
+                                    getString(R.string.install_game_content_failure_file_extension)
+                                )
+                                installResult.append(separator)
+                            }
+                            if (errorOther > 0) {
+                                installResult.append(
+                                    getString(R.string.install_game_content_failure_description)
+                                )
+                                installResult.append(separator)
+                            }
+                            LongMessageDialogFragment.newInstance(
+                                R.string.install_game_content_failure,
+                                installResult.toString().trim(),
+                                R.string.install_game_content_help_link
+                            ).show(supportFragmentManager, LongMessageDialogFragment.TAG)
+                        } else {
+                            LongMessageDialogFragment.newInstance(
+                                R.string.install_game_content_success,
+                                installResult.toString().trim()
+                            ).show(supportFragmentManager, LongMessageDialogFragment.TAG)
+                        }
+                    }
                 }
-                return@newInstance result
+                return@newInstance installSuccess + installOverwrite + errorTotal
             }.show(supportFragmentManager, IndeterminateProgressDialogFragment.TAG)
         }
+    }
 }
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/MemoryUtil.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/MemoryUtil.kt
new file mode 100644
index 000000000..18e5fa0b0
--- /dev/null
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/MemoryUtil.kt
@@ -0,0 +1,59 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.yuzu.yuzu_emu.utils
+
+import android.app.ActivityManager
+import android.content.Context
+import org.yuzu.yuzu_emu.R
+import java.util.Locale
+
+class MemoryUtil(val context: Context) {
+
+    private val Long.floatForm: String
+        get() = String.format(Locale.ROOT, "%.2f", this.toDouble())
+
+    private fun bytesToSizeUnit(size: Long): String {
+        return when {
+            size < Kb -> "${size.floatForm} ${context.getString(R.string.memory_byte)}"
+            size < Mb -> "${(size / Kb).floatForm} ${context.getString(R.string.memory_kilobyte)}"
+            size < Gb -> "${(size / Mb).floatForm} ${context.getString(R.string.memory_megabyte)}"
+            size < Tb -> "${(size / Gb).floatForm} ${context.getString(R.string.memory_gigabyte)}"
+            size < Pb -> "${(size / Tb).floatForm} ${context.getString(R.string.memory_terabyte)}"
+            size < Eb -> "${(size / Pb).floatForm} ${context.getString(R.string.memory_petabyte)}"
+            else -> "${(size / Eb).floatForm} ${context.getString(R.string.memory_exabyte)}"
+        }
+    }
+
+    private val totalMemory =
+        with(context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager) {
+            val memInfo = ActivityManager.MemoryInfo()
+            getMemoryInfo(memInfo)
+            memInfo.totalMem
+        }
+
+    fun isLessThan(minimum: Int, size: Long): Boolean {
+        return when (size) {
+            Kb -> totalMemory < Mb && totalMemory < minimum
+            Mb -> totalMemory < Gb && (totalMemory / Mb) < minimum
+            Gb -> totalMemory < Tb && (totalMemory / Gb) < minimum
+            Tb -> totalMemory < Pb && (totalMemory / Tb) < minimum
+            Pb -> totalMemory < Eb && (totalMemory / Pb) < minimum
+            Eb -> totalMemory / Eb < minimum
+            else -> totalMemory < Kb && totalMemory < minimum
+        }
+    }
+
+    fun getDeviceRAM(): String {
+        return bytesToSizeUnit(totalMemory)
+    }
+
+    companion object {
+        const val Kb: Long = 1024
+        const val Mb = Kb * 1024
+        const val Gb = Mb * 1024
+        const val Tb = Gb * 1024
+        const val Pb = Tb * 1024
+        const val Eb = Pb * 1024
+    }
+}
diff --git a/src/android/app/src/main/jni/native.cpp b/src/android/app/src/main/jni/native.cpp
index 632aa50b3..f4fed0886 100644
--- a/src/android/app/src/main/jni/native.cpp
+++ b/src/android/app/src/main/jni/native.cpp
@@ -237,6 +237,7 @@ public:
         m_software_keyboard = android_keyboard.get();
         m_system.SetShuttingDown(false);
         m_system.ApplySettings();
+        Settings::LogSettings();
         m_system.HIDCore().ReloadInputDevices();
         m_system.SetAppletFrontendSet({
             nullptr,                     // Amiibo Settings
diff --git a/src/android/app/src/main/res/values/strings.xml b/src/android/app/src/main/res/values/strings.xml
index cc1d8c39d..21805d274 100644
--- a/src/android/app/src/main/res/values/strings.xml
+++ b/src/android/app/src/main/res/values/strings.xml
@@ -104,12 +104,14 @@
     <string name="share_log_missing">No log file found</string>
     <string name="install_game_content">Install game content</string>
     <string name="install_game_content_description">Install game updates or DLC</string>
-    <string name="install_game_content_failure">Error installing file to NAND</string>
-    <string name="install_game_content_failure_description">Game content installation failed. Please ensure content is valid and that the prod.keys file is installed.</string>
-    <string name="install_game_content_failure_base">Installation of base games isn\'t permitted in order to avoid possible conflicts. Please select an update or DLC instead.</string>
-    <string name="install_game_content_failure_file_extension">The selected file type is not supported. Only NSP and XCI content is supported for this action. Please verify the game content is valid.</string>
-    <string name="install_game_content_success">Game content installed successfully</string>
-    <string name="install_game_content_success_overwrite">Game content was overwritten successfully</string>
+    <string name="install_game_content_failure">Error installing file(s) to NAND</string>
+    <string name="install_game_content_failure_description">Please ensure content(s) are valid and that the prod.keys file is installed.</string>
+    <string name="install_game_content_failure_base">Installation of base games isn\'t permitted in order to avoid possible conflicts.</string>
+    <string name="install_game_content_failure_file_extension">Only NSP and XCI content is supported. Please verify the game content(s) are valid.</string>
+    <string name="install_game_content_failed_count">%1$d installation error(s)</string>
+    <string name="install_game_content_success">Game content(s) installed successfully</string>
+    <string name="install_game_content_success_install">%1$d installed successfully</string>
+    <string name="install_game_content_success_overwrite">%1$d overwritten successfully</string>
     <string name="install_game_content_help_link">https://yuzu-emu.org/help/quickstart/#dumping-installed-updates</string>
 
     <!-- About screen strings -->
@@ -270,6 +272,7 @@
     <string name="fatal_error">Fatal Error</string>
     <string name="fatal_error_message">A fatal error occurred. Check the log for details.\nContinuing emulation may result in crashes and bugs.</string>
     <string name="performance_warning">Turning off this setting will significantly reduce emulation performance! For the best experience, it is recommended that you leave this setting enabled.</string>
+    <string name="device_memory_inadequate">Device RAM: %1$s\nRecommended: %2$s</string>
 
     <!-- Region Names -->
     <string name="region_japan">Japan</string>
@@ -300,6 +303,15 @@
     <string name="language_traditional_chinese">Traditional Chinese (正體中文)</string>
     <string name="language_brazilian_portuguese">Brazilian Portuguese (Português do Brasil)</string>
 
+    <!-- Memory Sizes -->
+    <string name="memory_byte">Byte</string>
+    <string name="memory_kilobyte">KB</string>
+    <string name="memory_megabyte">MB</string>
+    <string name="memory_gigabyte">GB</string>
+    <string name="memory_terabyte">TB</string>
+    <string name="memory_petabyte">PB</string>
+    <string name="memory_exabyte">EB</string>
+
     <!-- Renderer APIs -->
     <string name="renderer_vulkan">Vulkan</string>
     <string name="renderer_none">None</string>
diff --git a/src/common/fs/fs.cpp b/src/common/fs/fs.cpp
index 6d66c926d..1baf6d746 100644
--- a/src/common/fs/fs.cpp
+++ b/src/common/fs/fs.cpp
@@ -436,7 +436,7 @@ void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable
 
         if (True(filter & DirEntryFilter::File) &&
             entry.status().type() == fs::file_type::regular) {
-            if (!callback(entry.path())) {
+            if (!callback(entry)) {
                 callback_error = true;
                 break;
             }
@@ -444,7 +444,7 @@ void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable
 
         if (True(filter & DirEntryFilter::Directory) &&
             entry.status().type() == fs::file_type::directory) {
-            if (!callback(entry.path())) {
+            if (!callback(entry)) {
                 callback_error = true;
                 break;
             }
@@ -493,7 +493,7 @@ void IterateDirEntriesRecursively(const std::filesystem::path& path,
 
         if (True(filter & DirEntryFilter::File) &&
             entry.status().type() == fs::file_type::regular) {
-            if (!callback(entry.path())) {
+            if (!callback(entry)) {
                 callback_error = true;
                 break;
             }
@@ -501,7 +501,7 @@ void IterateDirEntriesRecursively(const std::filesystem::path& path,
 
         if (True(filter & DirEntryFilter::Directory) &&
             entry.status().type() == fs::file_type::directory) {
-            if (!callback(entry.path())) {
+            if (!callback(entry)) {
                 callback_error = true;
                 break;
             }
diff --git a/src/common/fs/fs_types.h b/src/common/fs/fs_types.h
index 5a4090c19..900f85d24 100644
--- a/src/common/fs/fs_types.h
+++ b/src/common/fs/fs_types.h
@@ -66,6 +66,6 @@ DECLARE_ENUM_FLAG_OPERATORS(DirEntryFilter);
  * @returns A boolean value.
  *          Return true to indicate whether the callback is successful, false otherwise.
  */
-using DirEntryCallable = std::function<bool(const std::filesystem::path& path)>;
+using DirEntryCallable = std::function<bool(const std::filesystem::directory_entry& entry)>;
 
 } // namespace Common::FS
diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 4e61d4335..d3286b352 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -153,7 +153,7 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     const auto sdmc_load_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
 
     std::vector<VirtualDir> patch_dirs = {sdmc_load_dir};
-    if (load_dir != nullptr && load_dir->GetSize() > 0) {
+    if (load_dir != nullptr) {
         const auto load_patch_dirs = load_dir->GetSubdirectories();
         patch_dirs.insert(patch_dirs.end(), load_patch_dirs.begin(), load_patch_dirs.end());
     }
@@ -354,8 +354,7 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
     const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
     const auto sdmc_load_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
     if ((type != ContentRecordType::Program && type != ContentRecordType::Data) ||
-        ((load_dir == nullptr || load_dir->GetSize() <= 0) &&
-         (sdmc_load_dir == nullptr || sdmc_load_dir->GetSize() <= 0))) {
+        (load_dir == nullptr && sdmc_load_dir == nullptr)) {
         return;
     }
 
@@ -496,7 +495,7 @@ PatchManager::PatchVersionNames PatchManager::GetPatchVersionNames(VirtualFile u
 
     // General Mods (LayeredFS and IPS)
     const auto mod_dir = fs_controller.GetModificationLoadRoot(title_id);
-    if (mod_dir != nullptr && mod_dir->GetSize() > 0) {
+    if (mod_dir != nullptr) {
         for (const auto& mod : mod_dir->GetSubdirectories()) {
             std::string types;
 
@@ -540,7 +539,7 @@ PatchManager::PatchVersionNames PatchManager::GetPatchVersionNames(VirtualFile u
 
     // SDMC mod directory (RomFS LayeredFS)
     const auto sdmc_mod_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
-    if (sdmc_mod_dir != nullptr && sdmc_mod_dir->GetSize() > 0) {
+    if (sdmc_mod_dir != nullptr) {
         std::string types;
         if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(sdmc_mod_dir, "exefs"))) {
             AppendCommaIfNotEmpty(types, "LayeredExeFS");
diff --git a/src/core/file_sys/vfs_real.cpp b/src/core/file_sys/vfs_real.cpp
index 7a15d8438..fcc81a664 100644
--- a/src/core/file_sys/vfs_real.cpp
+++ b/src/core/file_sys/vfs_real.cpp
@@ -10,6 +10,7 @@
 #include "common/fs/fs.h"
 #include "common/fs/path_util.h"
 #include "common/logging/log.h"
+#include "core/file_sys/vfs.h"
 #include "core/file_sys/vfs_real.h"
 
 // For FileTimeStampRaw
@@ -72,7 +73,8 @@ VfsEntryType RealVfsFilesystem::GetEntryType(std::string_view path_) const {
     return VfsEntryType::File;
 }
 
-VirtualFile RealVfsFilesystem::OpenFile(std::string_view path_, Mode perms) {
+VirtualFile RealVfsFilesystem::OpenFileFromEntry(std::string_view path_, std::optional<u64> size,
+                                                 Mode perms) {
     const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
 
     if (auto it = cache.find(path); it != cache.end()) {
@@ -81,20 +83,24 @@ VirtualFile RealVfsFilesystem::OpenFile(std::string_view path_, Mode perms) {
         }
     }
 
-    if (!FS::Exists(path) || !FS::IsFile(path)) {
+    if (!size && !FS::IsFile(path)) {
         return nullptr;
     }
 
     auto reference = std::make_unique<FileReference>();
     this->InsertReferenceIntoList(*reference);
 
-    auto file =
-        std::shared_ptr<RealVfsFile>(new RealVfsFile(*this, std::move(reference), path, perms));
+    auto file = std::shared_ptr<RealVfsFile>(
+        new RealVfsFile(*this, std::move(reference), path, perms, size));
     cache[path] = file;
 
     return file;
 }
 
+VirtualFile RealVfsFilesystem::OpenFile(std::string_view path_, Mode perms) {
+    return OpenFileFromEntry(path_, {}, perms);
+}
+
 VirtualFile RealVfsFilesystem::CreateFile(std::string_view path_, Mode perms) {
     const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
     cache.erase(path);
@@ -243,10 +249,10 @@ void RealVfsFilesystem::RemoveReferenceFromList(FileReference& reference) {
 }
 
 RealVfsFile::RealVfsFile(RealVfsFilesystem& base_, std::unique_ptr<FileReference> reference_,
-                         const std::string& path_, Mode perms_)
+                         const std::string& path_, Mode perms_, std::optional<u64> size_)
     : base(base_), reference(std::move(reference_)), path(path_),
       parent_path(FS::GetParentPath(path_)), path_components(FS::SplitPathComponents(path_)),
-      perms(perms_) {}
+      size(size_), perms(perms_) {}
 
 RealVfsFile::~RealVfsFile() {
     base.DropReference(std::move(reference));
@@ -257,11 +263,14 @@ std::string RealVfsFile::GetName() const {
 }
 
 std::size_t RealVfsFile::GetSize() const {
-    base.RefreshReference(path, perms, *reference);
-    return reference->file ? reference->file->GetSize() : 0;
+    if (size) {
+        return *size;
+    }
+    return FS::GetSize(path);
 }
 
 bool RealVfsFile::Resize(std::size_t new_size) {
+    size.reset();
     base.RefreshReference(path, perms, *reference);
     return reference->file ? reference->file->SetSize(new_size) : false;
 }
@@ -287,6 +296,7 @@ std::size_t RealVfsFile::Read(u8* data, std::size_t length, std::size_t offset)
 }
 
 std::size_t RealVfsFile::Write(const u8* data, std::size_t length, std::size_t offset) {
+    size.reset();
     base.RefreshReference(path, perms, *reference);
     if (!reference->file || !reference->file->Seek(static_cast<s64>(offset))) {
         return 0;
@@ -309,10 +319,11 @@ std::vector<VirtualFile> RealVfsDirectory::IterateEntries<RealVfsFile, VfsFile>(
 
     std::vector<VirtualFile> out;
 
-    const FS::DirEntryCallable callback = [this, &out](const std::filesystem::path& full_path) {
-        const auto full_path_string = FS::PathToUTF8String(full_path);
+    const FS::DirEntryCallable callback = [this,
+                                           &out](const std::filesystem::directory_entry& entry) {
+        const auto full_path_string = FS::PathToUTF8String(entry.path());
 
-        out.emplace_back(base.OpenFile(full_path_string, perms));
+        out.emplace_back(base.OpenFileFromEntry(full_path_string, entry.file_size(), perms));
 
         return true;
     };
@@ -330,8 +341,9 @@ std::vector<VirtualDir> RealVfsDirectory::IterateEntries<RealVfsDirectory, VfsDi
 
     std::vector<VirtualDir> out;
 
-    const FS::DirEntryCallable callback = [this, &out](const std::filesystem::path& full_path) {
-        const auto full_path_string = FS::PathToUTF8String(full_path);
+    const FS::DirEntryCallable callback = [this,
+                                           &out](const std::filesystem::directory_entry& entry) {
+        const auto full_path_string = FS::PathToUTF8String(entry.path());
 
         out.emplace_back(base.OpenDirectory(full_path_string, perms));
 
@@ -483,12 +495,10 @@ std::map<std::string, VfsEntryType, std::less<>> RealVfsDirectory::GetEntries()
 
     std::map<std::string, VfsEntryType, std::less<>> out;
 
-    const FS::DirEntryCallable callback = [&out](const std::filesystem::path& full_path) {
-        const auto filename = FS::PathToUTF8String(full_path.filename());
-
+    const FS::DirEntryCallable callback = [&out](const std::filesystem::directory_entry& entry) {
+        const auto filename = FS::PathToUTF8String(entry.path().filename());
         out.insert_or_assign(filename,
-                             FS::IsDir(full_path) ? VfsEntryType::Directory : VfsEntryType::File);
-
+                             entry.is_directory() ? VfsEntryType::Directory : VfsEntryType::File);
         return true;
     };
 
diff --git a/src/core/file_sys/vfs_real.h b/src/core/file_sys/vfs_real.h
index d8c900e33..67f4c4422 100644
--- a/src/core/file_sys/vfs_real.h
+++ b/src/core/file_sys/vfs_real.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <map>
+#include <optional>
 #include <string_view>
 #include "common/intrusive_list.h"
 #include "core/file_sys/mode.h"
@@ -20,6 +21,8 @@ struct FileReference : public Common::IntrusiveListBaseNode<FileReference> {
 };
 
 class RealVfsFile;
+class RealVfsDirectory;
+
 class RealVfsFilesystem : public VfsFilesystem {
 public:
     RealVfsFilesystem();
@@ -56,6 +59,11 @@ private:
 private:
     void InsertReferenceIntoList(FileReference& reference);
     void RemoveReferenceFromList(FileReference& reference);
+
+private:
+    friend class RealVfsDirectory;
+    VirtualFile OpenFileFromEntry(std::string_view path, std::optional<u64> size,
+                                  Mode perms = Mode::Read);
 };
 
 // An implementation of VfsFile that represents a file on the user's computer.
@@ -78,13 +86,14 @@ public:
 
 private:
     RealVfsFile(RealVfsFilesystem& base, std::unique_ptr<FileReference> reference,
-                const std::string& path, Mode perms = Mode::Read);
+                const std::string& path, Mode perms = Mode::Read, std::optional<u64> size = {});
 
     RealVfsFilesystem& base;
     std::unique_ptr<FileReference> reference;
     std::string path;
     std::string parent_path;
     std::vector<std::string> path_components;
+    std::optional<u64> size;
     Mode perms;
 };