14 files changed, 194 insertions, 65 deletions

diff --git a/src/core/file_sys/content_archive.cpp b/src/core/file_sys/content_archive.cpp
index 19b6f8600..5aa3b600b 100644
--- a/src/core/file_sys/content_archive.cpp
+++ b/src/core/file_sys/content_archive.cpp
@@ -359,6 +359,8 @@ bool NCA::ReadPFS0Section(const NCASectionHeader& section, const NCASectionTable
             dirs.push_back(std::move(npfs));
             if (IsDirectoryExeFS(dirs.back()))
                 exefs = dirs.back();
+            else if (IsDirectoryLogoPartition(dirs.back()))
+                logo = dirs.back();
         } else {
             if (has_rights_id)
                 status = Loader::ResultStatus::ErrorIncorrectTitlekeyOrTitlekek;
@@ -546,4 +548,8 @@ u64 NCA::GetBaseIVFCOffset() const {
     return ivfc_offset;
 }
 
+VirtualDir NCA::GetLogoPartition() const {
+    return logo;
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/content_archive.h b/src/core/file_sys/content_archive.h
index 99294cbb4..5d4d05c82 100644
--- a/src/core/file_sys/content_archive.h
+++ b/src/core/file_sys/content_archive.h
@@ -74,6 +74,13 @@ inline bool IsDirectoryExeFS(const std::shared_ptr<VfsDirectory>& pfs) {
     return pfs->GetFile("main") != nullptr && pfs->GetFile("main.npdm") != nullptr;
 }
 
+inline bool IsDirectoryLogoPartition(const VirtualDir& pfs) {
+    // NintendoLogo is the static image in the top left corner while StartupMovie is the animation
+    // in the bottom right corner.
+    return pfs->GetFile("NintendoLogo.png") != nullptr &&
+           pfs->GetFile("StartupMovie.gif") != nullptr;
+}
+
 // An implementation of VfsDirectory that represents a Nintendo Content Archive (NCA) conatiner.
 // After construction, use GetStatus to determine if the file is valid and ready to be used.
 class NCA : public ReadOnlyVfsDirectory {
@@ -102,6 +109,8 @@ public:
     // Returns the base ivfc offset used in BKTR patching.
     u64 GetBaseIVFCOffset() const;
 
+    VirtualDir GetLogoPartition() const;
+
 private:
     bool CheckSupportedNCA(const NCAHeader& header);
     bool HandlePotentialHeaderDecryption();
@@ -122,6 +131,7 @@ private:
 
     VirtualFile romfs = nullptr;
     VirtualDir exefs = nullptr;
+    VirtualDir logo = nullptr;
     VirtualFile file;
     VirtualFile bktr_base_romfs;
     u64 ivfc_offset = 0;
diff --git a/src/core/file_sys/control_metadata.cpp b/src/core/file_sys/control_metadata.cpp
index e065e592f..83c184750 100644
--- a/src/core/file_sys/control_metadata.cpp
+++ b/src/core/file_sys/control_metadata.cpp
@@ -36,18 +36,20 @@ std::string LanguageEntry::GetDeveloperName() const {
                                                        developer_name.size());
 }
 
-NACP::NACP(VirtualFile file) : raw(std::make_unique<RawNACP>()) {
-    file->ReadObject(raw.get());
+NACP::NACP() = default;
+
+NACP::NACP(VirtualFile file) {
+    file->ReadObject(&raw);
 }
 
 NACP::~NACP() = default;
 
 const LanguageEntry& NACP::GetLanguageEntry(Language language) const {
     if (language != Language::Default) {
-        return raw->language_entries.at(static_cast<u8>(language));
+        return raw.language_entries.at(static_cast<u8>(language));
     }
 
-    for (const auto& language_entry : raw->language_entries) {
+    for (const auto& language_entry : raw.language_entries) {
         if (!language_entry.GetApplicationName().empty())
             return language_entry;
     }
@@ -65,21 +67,29 @@ std::string NACP::GetDeveloperName(Language language) const {
 }
 
 u64 NACP::GetTitleId() const {
-    return raw->title_id;
+    return raw.title_id;
 }
 
 u64 NACP::GetDLCBaseTitleId() const {
-    return raw->dlc_base_title_id;
+    return raw.dlc_base_title_id;
 }
 
 std::string NACP::GetVersionString() const {
-    return Common::StringFromFixedZeroTerminatedBuffer(raw->version_string.data(),
-                                                       raw->version_string.size());
+    return Common::StringFromFixedZeroTerminatedBuffer(raw.version_string.data(),
+                                                       raw.version_string.size());
+}
+
+u64 NACP::GetDefaultNormalSaveSize() const {
+    return raw.normal_save_data_size;
+}
+
+u64 NACP::GetDefaultJournalSaveSize() const {
+    return raw.journal_sava_data_size;
 }
 
 std::vector<u8> NACP::GetRawBytes() const {
     std::vector<u8> out(sizeof(RawNACP));
-    std::memcpy(out.data(), raw.get(), sizeof(RawNACP));
+    std::memcpy(out.data(), &raw, sizeof(RawNACP));
     return out;
 }
 } // namespace FileSys
diff --git a/src/core/file_sys/control_metadata.h b/src/core/file_sys/control_metadata.h
index bfaad46b4..7b9cdc910 100644
--- a/src/core/file_sys/control_metadata.h
+++ b/src/core/file_sys/control_metadata.h
@@ -28,17 +28,30 @@ static_assert(sizeof(LanguageEntry) == 0x300, "LanguageEntry has incorrect size.
 // The raw file format of a NACP file.
 struct RawNACP {
     std::array<LanguageEntry, 16> language_entries;
-    INSERT_PADDING_BYTES(0x38);
+    std::array<u8, 0x25> isbn;
+    u8 startup_user_account;
+    INSERT_PADDING_BYTES(2);
+    u32_le application_attribute;
+    u32_le supported_languages;
+    u32_le parental_control;
+    bool screenshot_enabled;
+    u8 video_capture_mode;
+    bool data_loss_confirmation;
+    INSERT_PADDING_BYTES(1);
     u64_le title_id;
-    INSERT_PADDING_BYTES(0x20);
+    std::array<u8, 0x20> rating_age;
     std::array<char, 0x10> version_string;
     u64_le dlc_base_title_id;
     u64_le title_id_2;
-    INSERT_PADDING_BYTES(0x28);
+    u64_le normal_save_data_size;
+    u64_le journal_sava_data_size;
+    INSERT_PADDING_BYTES(0x18);
     u64_le product_code;
-    u64_le title_id_3;
-    std::array<u64_le, 0x7> title_id_array;
-    INSERT_PADDING_BYTES(0x8);
+    std::array<u64_le, 0x8> local_communication;
+    u8 logo_type;
+    u8 logo_handling;
+    bool runtime_add_on_content_install;
+    INSERT_PADDING_BYTES(5);
     u64_le title_id_update;
     std::array<u8, 0x40> bcat_passphrase;
     INSERT_PADDING_BYTES(0xEC0);
@@ -72,6 +85,7 @@ extern const std::array<const char*, 15> LANGUAGE_NAMES;
 // These store application name, dev name, title id, and other miscellaneous data.
 class NACP {
 public:
+    explicit NACP();
     explicit NACP(VirtualFile file);
     ~NACP();
 
@@ -81,10 +95,12 @@ public:
     u64 GetTitleId() const;
     u64 GetDLCBaseTitleId() const;
     std::string GetVersionString() const;
+    u64 GetDefaultNormalSaveSize() const;
+    u64 GetDefaultJournalSaveSize() const;
     std::vector<u8> GetRawBytes() const;
 
 private:
-    std::unique_ptr<RawNACP> raw;
+    RawNACP raw{};
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/directory.h b/src/core/file_sys/directory.h
index 12bb90ec8..7b5c509fb 100644
--- a/src/core/file_sys/directory.h
+++ b/src/core/file_sys/directory.h
@@ -29,8 +29,8 @@ struct Entry {
         filename[copy_size] = '\0';
     }
 
-    char filename[0x300];
-    INSERT_PADDING_BYTES(4);
+    char filename[0x301];
+    INSERT_PADDING_BYTES(3);
     EntryType type;
     INSERT_PADDING_BYTES(3);
     u64 file_size;
@@ -39,27 +39,4 @@ static_assert(sizeof(Entry) == 0x310, "Directory Entry struct isn't exactly 0x31
 static_assert(offsetof(Entry, type) == 0x304, "Wrong offset for type in Entry.");
 static_assert(offsetof(Entry, file_size) == 0x308, "Wrong offset for file_size in Entry.");
 
-class DirectoryBackend : NonCopyable {
-public:
-    DirectoryBackend() {}
-    virtual ~DirectoryBackend() {}
-
-    /**
-     * List files contained in the directory
-     * @param count Number of entries to return at once in entries
-     * @param entries Buffer to read data into
-     * @return Number of entries listed
-     */
-    virtual u64 Read(const u64 count, Entry* entries) = 0;
-
-    /// Returns the number of entries still left to read.
-    virtual u64 GetEntryCount() const = 0;
-
-    /**
-     * Close the directory
-     * @return true if the directory closed correctly
-     */
-    virtual bool Close() const = 0;
-};
-
 } // namespace FileSys
diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 6b14e08be..61706966e 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -56,6 +56,10 @@ PatchManager::PatchManager(u64 title_id) : title_id(title_id) {}
 
 PatchManager::~PatchManager() = default;
 
+u64 PatchManager::GetTitleID() const {
+    return title_id;
+}
+
 VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     LOG_INFO(Loader, "Patching ExeFS for title_id={:016X}", title_id);
 
@@ -73,11 +77,15 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
 
     const auto installed = Service::FileSystem::GetUnionContents();
 
+    const auto& disabled = Settings::values.disabled_addons[title_id];
+    const auto update_disabled =
+        std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
+
     // Game Updates
     const auto update_tid = GetUpdateTitleID(title_id);
     const auto update = installed.GetEntry(update_tid, ContentRecordType::Program);
 
-    if (update != nullptr && update->GetExeFS() != nullptr &&
+    if (!update_disabled && update != nullptr && update->GetExeFS() != nullptr &&
         update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS) {
         LOG_INFO(Loader, "    ExeFS: Update ({}) applied successfully",
                  FormatTitleVersion(installed.GetEntryVersion(update_tid).value_or(0)));
@@ -95,6 +103,9 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
         std::vector<VirtualDir> layers;
         layers.reserve(patch_dirs.size() + 1);
         for (const auto& subdir : patch_dirs) {
+            if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
+                continue;
+
             auto exefs_dir = subdir->GetSubdirectory("exefs");
             if (exefs_dir != nullptr)
                 layers.push_back(std::move(exefs_dir));
@@ -111,11 +122,16 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     return exefs;
 }
 
-static std::vector<VirtualFile> CollectPatches(const std::vector<VirtualDir>& patch_dirs,
-                                               const std::string& build_id) {
+std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualDir>& patch_dirs,
+                                                      const std::string& build_id) const {
+    const auto& disabled = Settings::values.disabled_addons[title_id];
+
     std::vector<VirtualFile> out;
     out.reserve(patch_dirs.size());
     for (const auto& subdir : patch_dirs) {
+        if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
+            continue;
+
         auto exefs_dir = subdir->GetSubdirectory("exefs");
         if (exefs_dir != nullptr) {
             for (const auto& file : exefs_dir->GetFiles()) {
@@ -228,6 +244,7 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
         return;
     }
 
+    const auto& disabled = Settings::values.disabled_addons[title_id];
     auto patch_dirs = load_dir->GetSubdirectories();
     std::sort(patch_dirs.begin(), patch_dirs.end(),
               [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
@@ -237,6 +254,9 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
     layers.reserve(patch_dirs.size() + 1);
     layers_ext.reserve(patch_dirs.size() + 1);
     for (const auto& subdir : patch_dirs) {
+        if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
+            continue;
+
         auto romfs_dir = subdir->GetSubdirectory("romfs");
         if (romfs_dir != nullptr)
             layers.push_back(std::move(romfs_dir));
@@ -266,13 +286,12 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
 VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, ContentRecordType type,
                                      VirtualFile update_raw) const {
     const auto log_string = fmt::format("Patching RomFS for title_id={:016X}, type={:02X}",
-                                        title_id, static_cast<u8>(type))
-                                .c_str();
+                                        title_id, static_cast<u8>(type));
 
     if (type == ContentRecordType::Program || type == ContentRecordType::Data)
-        LOG_INFO(Loader, log_string);
+        LOG_INFO(Loader, "{}", log_string);
     else
-        LOG_DEBUG(Loader, log_string);
+        LOG_DEBUG(Loader, "{}", log_string);
 
     if (romfs == nullptr)
         return romfs;
@@ -282,7 +301,12 @@ VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, Content
     // Game Updates
     const auto update_tid = GetUpdateTitleID(title_id);
     const auto update = installed.GetEntryRaw(update_tid, type);
-    if (update != nullptr) {
+
+    const auto& disabled = Settings::values.disabled_addons[title_id];
+    const auto update_disabled =
+        std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
+
+    if (!update_disabled && update != nullptr) {
         const auto new_nca = std::make_shared<NCA>(update, romfs, ivfc_offset);
         if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
             new_nca->GetRomFS() != nullptr) {
@@ -290,7 +314,7 @@ VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, Content
                      FormatTitleVersion(installed.GetEntryVersion(update_tid).value_or(0)));
             romfs = new_nca->GetRomFS();
         }
-    } else if (update_raw != nullptr) {
+    } else if (!update_disabled && update_raw != nullptr) {
         const auto new_nca = std::make_shared<NCA>(update_raw, romfs, ivfc_offset);
         if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
             new_nca->GetRomFS() != nullptr) {
@@ -320,25 +344,30 @@ std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNam
     VirtualFile update_raw) const {
     std::map<std::string, std::string, std::less<>> out;
     const auto installed = Service::FileSystem::GetUnionContents();
+    const auto& disabled = Settings::values.disabled_addons[title_id];
 
     // Game Updates
     const auto update_tid = GetUpdateTitleID(title_id);
     PatchManager update{update_tid};
     auto [nacp, discard_icon_file] = update.GetControlMetadata();
 
+    const auto update_disabled =
+        std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
+    const auto update_label = update_disabled ? "[D] Update" : "Update";
+
     if (nacp != nullptr) {
-        out.insert_or_assign("Update", nacp->GetVersionString());
+        out.insert_or_assign(update_label, nacp->GetVersionString());
     } else {
         if (installed.HasEntry(update_tid, ContentRecordType::Program)) {
             const auto meta_ver = installed.GetEntryVersion(update_tid);
             if (meta_ver.value_or(0) == 0) {
-                out.insert_or_assign("Update", "");
+                out.insert_or_assign(update_label, "");
             } else {
                 out.insert_or_assign(
-                    "Update", FormatTitleVersion(*meta_ver, TitleVersionFormat::ThreeElements));
+                    update_label, FormatTitleVersion(*meta_ver, TitleVersionFormat::ThreeElements));
             }
         } else if (update_raw != nullptr) {
-            out.insert_or_assign("Update", "PACKED");
+            out.insert_or_assign(update_label, "PACKED");
         }
     }
 
@@ -378,7 +407,9 @@ std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNam
             if (types.empty())
                 continue;
 
-            out.insert_or_assign(mod->GetName(), types);
+            const auto mod_disabled =
+                std::find(disabled.begin(), disabled.end(), mod->GetName()) != disabled.end();
+            out.insert_or_assign(mod_disabled ? "[D] " + mod->GetName() : mod->GetName(), types);
         }
     }
 
@@ -401,7 +432,9 @@ std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNam
 
         list += fmt::format("{}", dlc_match.back().title_id & 0x7FF);
 
-        out.insert_or_assign("DLC", std::move(list));
+        const auto dlc_disabled =
+            std::find(disabled.begin(), disabled.end(), "DLC") != disabled.end();
+        out.insert_or_assign(dlc_disabled ? "[D] DLC" : "DLC", std::move(list));
     }
 
     return out;
diff --git a/src/core/file_sys/patch_manager.h b/src/core/file_sys/patch_manager.h
index 7d168837f..b8a1652fd 100644
--- a/src/core/file_sys/patch_manager.h
+++ b/src/core/file_sys/patch_manager.h
@@ -30,6 +30,8 @@ public:
     explicit PatchManager(u64 title_id);
     ~PatchManager();
 
+    u64 GetTitleID() const;
+
     // Currently tracked ExeFS patches:
     // - Game Updates
     VirtualDir PatchExeFS(VirtualDir exefs) const;
@@ -63,6 +65,9 @@ public:
     std::pair<std::unique_ptr<NACP>, VirtualFile> ParseControlNCA(const NCA& nca) const;
 
 private:
+    std::vector<VirtualFile> CollectPatches(const std::vector<VirtualDir>& patch_dirs,
+                                            const std::string& build_id) const;
+
     u64 title_id;
 };
 
diff --git a/src/core/file_sys/program_metadata.cpp b/src/core/file_sys/program_metadata.cpp
index 8903ed1d3..d3e00437f 100644
--- a/src/core/file_sys/program_metadata.cpp
+++ b/src/core/file_sys/program_metadata.cpp
@@ -40,6 +40,13 @@ Loader::ResultStatus ProgramMetadata::Load(VirtualFile file) {
     if (sizeof(FileAccessHeader) != file->ReadObject(&aci_file_access, aci_header.fah_offset))
         return Loader::ResultStatus::ErrorBadFileAccessHeader;
 
+    aci_kernel_capabilities.resize(aci_header.kac_size / sizeof(u32));
+    const u64 read_size = aci_header.kac_size;
+    const u64 read_offset = npdm_header.aci_offset + aci_header.kac_offset;
+    if (file->ReadBytes(aci_kernel_capabilities.data(), read_size, read_offset) != read_size) {
+        return Loader::ResultStatus::ErrorBadKernelCapabilityDescriptors;
+    }
+
     return Loader::ResultStatus::Success;
 }
 
@@ -71,6 +78,10 @@ u64 ProgramMetadata::GetFilesystemPermissions() const {
     return aci_file_access.permissions;
 }
 
+const ProgramMetadata::KernelCapabilityDescriptors& ProgramMetadata::GetKernelCapabilities() const {
+    return aci_kernel_capabilities;
+}
+
 void ProgramMetadata::Print() const {
     LOG_DEBUG(Service_FS, "Magic:                  {:.4}", npdm_header.magic.data());
     LOG_DEBUG(Service_FS, "Main thread priority:   0x{:02X}", npdm_header.main_thread_priority);
@@ -81,16 +92,20 @@ void ProgramMetadata::Print() const {
     LOG_DEBUG(Service_FS, " > 64-bit instructions: {}",
               npdm_header.has_64_bit_instructions ? "YES" : "NO");
 
-    auto address_space = "Unknown";
+    const char* address_space = "Unknown";
     switch (npdm_header.address_space_type) {
     case ProgramAddressSpaceType::Is36Bit:
+        address_space = "64-bit (36-bit address space)";
+        break;
     case ProgramAddressSpaceType::Is39Bit:
-        address_space = "64-bit";
+        address_space = "64-bit (39-bit address space)";
         break;
     case ProgramAddressSpaceType::Is32Bit:
-    case ProgramAddressSpaceType::Is32BitNoMap:
         address_space = "32-bit";
         break;
+    case ProgramAddressSpaceType::Is32BitNoMap:
+        address_space = "32-bit (no map region)";
+        break;
     }
 
     LOG_DEBUG(Service_FS, " > Address space:       {}\n", address_space);
diff --git a/src/core/file_sys/program_metadata.h b/src/core/file_sys/program_metadata.h
index e4470d6f0..0033ba347 100644
--- a/src/core/file_sys/program_metadata.h
+++ b/src/core/file_sys/program_metadata.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include <array>
+#include <vector>
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "common/swap.h"
@@ -38,6 +39,8 @@ enum class ProgramFilePermission : u64 {
  */
 class ProgramMetadata {
 public:
+    using KernelCapabilityDescriptors = std::vector<u32>;
+
     ProgramMetadata();
     ~ProgramMetadata();
 
@@ -50,6 +53,7 @@ public:
     u32 GetMainThreadStackSize() const;
     u64 GetTitleID() const;
     u64 GetFilesystemPermissions() const;
+    const KernelCapabilityDescriptors& GetKernelCapabilities() const;
 
     void Print() const;
 
@@ -154,6 +158,8 @@ private:
 
     FileAccessControl acid_file_access;
     FileAccessHeader aci_file_access;
+
+    KernelCapabilityDescriptors aci_kernel_capabilities;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/romfs.cpp b/src/core/file_sys/romfs.cpp
index 81e1f66ac..ebbdf081e 100644
--- a/src/core/file_sys/romfs.cpp
+++ b/src/core/file_sys/romfs.cpp
@@ -119,6 +119,9 @@ VirtualDir ExtractRomFS(VirtualFile file, RomFSExtractionType type) {
 
     VirtualDir out = std::move(root);
 
+    if (type == RomFSExtractionType::SingleDiscard)
+        return out->GetSubdirectories().front();
+
     while (out->GetSubdirectories().size() == 1 && out->GetFiles().empty()) {
         if (out->GetSubdirectories().front()->GetName() == "data" &&
             type == RomFSExtractionType::Truncated)
diff --git a/src/core/file_sys/romfs.h b/src/core/file_sys/romfs.h
index 0ec404731..0f35639bc 100644
--- a/src/core/file_sys/romfs.h
+++ b/src/core/file_sys/romfs.h
@@ -33,8 +33,9 @@ struct IVFCHeader {
 static_assert(sizeof(IVFCHeader) == 0xE0, "IVFCHeader has incorrect size.");
 
 enum class RomFSExtractionType {
-    Full,      // Includes data directory
-    Truncated, // Traverses into data directory
+    Full,          // Includes data directory
+    Truncated,     // Traverses into data directory
+    SingleDiscard, // Traverses into the first subdirectory of root
 };
 
 // Converts a RomFS binary blob to VFS Filesystem
diff --git a/src/core/file_sys/savedata_factory.cpp b/src/core/file_sys/savedata_factory.cpp
index 5434f2149..1913dc956 100644
--- a/src/core/file_sys/savedata_factory.cpp
+++ b/src/core/file_sys/savedata_factory.cpp
@@ -13,12 +13,18 @@
 
 namespace FileSys {
 
+constexpr char SAVE_DATA_SIZE_FILENAME[] = ".yuzu_save_size";
+
 std::string SaveDataDescriptor::DebugInfo() const {
     return fmt::format("[type={:02X}, title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}]",
                        static_cast<u8>(type), title_id, user_id[1], user_id[0], save_id);
 }
 
-SaveDataFactory::SaveDataFactory(VirtualDir save_directory) : dir(std::move(save_directory)) {}
+SaveDataFactory::SaveDataFactory(VirtualDir save_directory) : dir(std::move(save_directory)) {
+    // Delete all temporary storages
+    // On hardware, it is expected that temporary storage be empty at first use.
+    dir->DeleteSubdirectoryRecursive("temp");
+}
 
 SaveDataFactory::~SaveDataFactory() = default;
 
@@ -120,9 +126,40 @@ std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType typ
     case SaveDataType::TemporaryStorage:
         return fmt::format("{}{:016X}/{:016X}{:016X}/{:016X}", out, 0, user_id[1], user_id[0],
                            title_id);
+    case SaveDataType::CacheStorage:
+        return fmt::format("{}save/cache/{:016X}", out, title_id);
     default:
         ASSERT_MSG(false, "Unrecognized SaveDataType: {:02X}", static_cast<u8>(type));
+        return fmt::format("{}save/unknown_{:X}/{:016X}", out, static_cast<u8>(type), title_id);
     }
 }
 
+SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
+                                               u128 user_id) const {
+    const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+    const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
+
+    const auto size_file = dir->GetFile(SAVE_DATA_SIZE_FILENAME);
+    if (size_file == nullptr || size_file->GetSize() < sizeof(SaveDataSize))
+        return {0, 0};
+
+    SaveDataSize out;
+    if (size_file->ReadObject(&out) != sizeof(SaveDataSize))
+        return {0, 0};
+    return out;
+}
+
+void SaveDataFactory::WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id,
+                                        SaveDataSize new_value) {
+    const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+    const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
+
+    const auto size_file = dir->CreateFile(SAVE_DATA_SIZE_FILENAME);
+    if (size_file == nullptr)
+        return;
+
+    size_file->Resize(sizeof(SaveDataSize));
+    size_file->WriteObject(new_value);
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/savedata_factory.h b/src/core/file_sys/savedata_factory.h
index 2a0088040..3a1caf292 100644
--- a/src/core/file_sys/savedata_factory.h
+++ b/src/core/file_sys/savedata_factory.h
@@ -17,8 +17,10 @@ namespace FileSys {
 enum class SaveDataSpaceId : u8 {
     NandSystem = 0,
     NandUser = 1,
-    SdCard = 2,
+    SdCardSystem = 2,
     TemporaryStorage = 3,
+    SdCardUser = 4,
+    ProperSystem = 100,
 };
 
 enum class SaveDataType : u8 {
@@ -44,6 +46,11 @@ struct SaveDataDescriptor {
 };
 static_assert(sizeof(SaveDataDescriptor) == 0x40, "SaveDataDescriptor has incorrect size.");
 
+struct SaveDataSize {
+    u64 normal;
+    u64 journal;
+};
+
 /// File system interface to the SaveData archive
 class SaveDataFactory {
 public:
@@ -58,6 +65,9 @@ public:
     static std::string GetFullPath(SaveDataSpaceId space, SaveDataType type, u64 title_id,
                                    u128 user_id, u64 save_id);
 
+    SaveDataSize ReadSaveDataSize(SaveDataType type, u64 title_id, u128 user_id) const;
+    void WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id, SaveDataSize new_value);
+
 private:
     VirtualDir dir;
 };
diff --git a/src/core/file_sys/vfs.h b/src/core/file_sys/vfs.h
index e5641b255..954094772 100644
--- a/src/core/file_sys/vfs.h
+++ b/src/core/file_sys/vfs.h
@@ -150,7 +150,7 @@ public:
     template <typename T>
     std::size_t WriteArray(const T* data, std::size_t number_elements, std::size_t offset = 0) {
         static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
-        return Write(data, number_elements * sizeof(T), offset);
+        return Write(reinterpret_cast<const u8*>(data), number_elements * sizeof(T), offset);
     }
 
     // Writes size bytes starting at memory location data to offset in file.
@@ -166,7 +166,7 @@ public:
     template <typename T>
     std::size_t WriteObject(const T& data, std::size_t offset = 0) {
         static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
-        return Write(&data, sizeof(T), offset);
+        return Write(reinterpret_cast<const u8*>(&data), sizeof(T), offset);
     }
 
     // Renames the file to name. Returns whether or not the operation was successsful.