diff --git a/nx/include/switch/runtime/devices/fs_dev.h b/nx/include/switch/runtime/devices/fs_dev.h
index 84e0d394..881d1af2 100644
--- a/nx/include/switch/runtime/devices/fs_dev.h
+++ b/nx/include/switch/runtime/devices/fs_dev.h
@@ -33,6 +33,10 @@ Result fsdevMountSdmc(void);
 /// Mounts the specified SaveData.
 Result fsdevMountSaveData(const char *name, u64 application_id, AccountUid uid);
 
+/// Mounts the specified SaveData as ReadOnly.
+/// Only available on [2.0.0+].
+Result fsdevMountSaveDataReadOnly(const char *name, u64 application_id, AccountUid uid);
+
 /// Mounts the specified BcatSaveData.
 Result fsdevMountBcatSaveData(const char *name, u64 application_id);
 
diff --git a/nx/include/switch/services/fs.h b/nx/include/switch/services/fs.h
index 4f750887..dabc8e0a 100644
--- a/nx/include/switch/services/fs.h
+++ b/nx/include/switch/services/fs.h
@@ -323,16 +323,17 @@ Result fsOpenBisStorage(FsStorage* out, FsBisPartitionId partitionId);
 Result fsOpenSdCardFileSystem(FsFileSystem* out);
 
 Result fsCreateSaveDataFileSystemBySystemSaveDataId(const FsSaveDataAttribute* attr, const FsSaveDataCreationInfo* creation_info);
-Result fsDeleteSaveDataFileSystemBySaveDataSpaceId(FsSaveDataSpaceId save_data_space_id, u64 saveID); /// [2.0.0+]
+Result fsDeleteSaveDataFileSystemBySaveDataSpaceId(FsSaveDataSpaceId save_data_space_id, u64 saveID); ///< [2.0.0+]
 
 Result fsIsExFatSupported(bool* out);
 
 Result fsOpenGameCardFileSystem(FsFileSystem* out, const FsGameCardHandle* handle, FsGameCardPartition partition);
 
-Result fsExtendSaveDataFileSystem(FsSaveDataSpaceId save_data_space_id, u64 saveID, s64 dataSize, s64 journalSize); /// [3.0.0+]
+Result fsExtendSaveDataFileSystem(FsSaveDataSpaceId save_data_space_id, u64 saveID, s64 dataSize, s64 journalSize); ///< [3.0.0+]
 
 Result fsOpenSaveDataFileSystem(FsFileSystem* out, FsSaveDataSpaceId save_data_space_id, const FsSaveDataAttribute *attr);
 Result fsOpenSaveDataFileSystemBySystemSaveDataId(FsFileSystem* out, FsSaveDataSpaceId save_data_space_id, const FsSaveDataAttribute *attr);
+Result fsOpenReadOnlySaveDataFileSystem(FsFileSystem* out, FsSaveDataSpaceId save_data_space_id, const FsSaveDataAttribute *attr); ///< [2.0.0+].
 
 Result fsReadSaveDataFileSystemExtraDataBySaveDataSpaceId(void* buf, size_t len, FsSaveDataSpaceId save_data_space_id, u64 saveID);
 Result fsReadSaveDataFileSystemExtraData(void* buf, size_t len, u64 saveID);
@@ -342,7 +343,7 @@ Result fsOpenSaveDataInfoReader(FsSaveDataInfoReader* out, FsSaveDataSpaceId sav
 
 Result fsOpenImageDirectoryFileSystem(FsFileSystem* out, FsImageDirectoryId image_directory_id);
 Result fsOpenContentStorageFileSystem(FsFileSystem* out, FsContentStorageId content_storage_id);
-Result fsOpenCustomStorageFileSystem(FsFileSystem* out, FsCustomStorageId custom_storage_id); /// [7.0.0+]
+Result fsOpenCustomStorageFileSystem(FsFileSystem* out, FsCustomStorageId custom_storage_id); ///< [7.0.0+]
 
 Result fsOpenDataStorageByCurrentProcess(FsStorage* out);
 Result fsOpenDataStorageByDataId(FsStorage* out, u64 dataId, NcmStorageId storageId);
@@ -371,6 +372,11 @@ Result fsCreate_SystemSaveData(FsSaveDataSpaceId save_data_space_id, u64 system_
 /// See \ref FsSaveDataAttribute for application_id and uid.
 Result fsOpen_SaveData(FsFileSystem* out, u64 application_id, AccountUid uid);
 
+/// Wrapper for fsOpenReadOnlySaveDataFileSystem.
+/// Only available on [2.0.0+].
+/// See \ref FsSaveDataAttribute for application_id and uid.
+Result fsOpen_SaveDataReadOnly(FsFileSystem* out, u64 application_id, AccountUid uid);
+
 /// Wrapper for fsOpenSaveDataFileSystem, for opening BcatSaveData.
 Result fsOpen_BcatSaveData(FsFileSystem* out, u64 application_id);
 
diff --git a/nx/source/runtime/devices/fs_dev.c b/nx/source/runtime/devices/fs_dev.c
index 619ab9ce..97ba9890 100644
--- a/nx/source/runtime/devices/fs_dev.c
+++ b/nx/source/runtime/devices/fs_dev.c
@@ -465,6 +465,19 @@ Result fsdevMountSaveData(const char *name, u64 application_id, AccountUid uid)
   return rc;
 }
 
+Result fsdevMountSaveDataReadOnly(const char *name, u64 application_id, AccountUid uid)
+{
+  FsFileSystem fs;
+  Result rc = fsOpen_SaveDataReadOnly(&fs, application_id, uid);
+  if(R_SUCCEEDED(rc))
+  {
+    int ret = fsdevMountDevice(name, fs);
+    if(ret==-1)
+      rc = MAKERESULT(Module_Libnx, LibnxError_OutOfMemory);
+  }
+  return rc;
+}
+
 Result fsdevMountBcatSaveData(const char *name, u64 application_id)
 {
   FsFileSystem fs;
diff --git a/nx/source/services/fs.c b/nx/source/services/fs.c
index 96c28b34..2f9f3aac 100644
--- a/nx/source/services/fs.c
+++ b/nx/source/services/fs.c
@@ -293,6 +293,22 @@ Result fsOpenSaveDataFileSystemBySystemSaveDataId(FsFileSystem* out, FsSaveDataS
     );
 }
 
+Result fsOpenReadOnlySaveDataFileSystem(FsFileSystem* out, FsSaveDataSpaceId save_data_space_id, const FsSaveDataAttribute *attr) {
+    if (hosversionBefore(2,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    const struct {
+        u8 save_data_space_id;
+        u8 pad[7];
+        FsSaveDataAttribute attr;
+    } in = { (u8)save_data_space_id, {0}, *attr };
+
+    return _fsObjectDispatchIn(&g_fsSrv, 53, in,
+        .out_num_objects = 1,
+        .out_objects = &out->s,
+    );
+}
+
 Result fsReadSaveDataFileSystemExtraDataBySaveDataSpaceId(void* buf, size_t len, FsSaveDataSpaceId save_data_space_id, u64 saveID) {
     if (hosversionBefore(3,0,0))
         return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
@@ -494,6 +510,17 @@ Result fsOpen_SaveData(FsFileSystem* out, u64 application_id, AccountUid uid) {
     return fsOpenSaveDataFileSystem(out, FsSaveDataSpaceId_User, &attr);
 }
 
+Result fsOpen_SaveDataReadOnly(FsFileSystem* out, u64 application_id, AccountUid uid) {
+    FsSaveDataAttribute attr;
+
+    memset(&attr, 0, sizeof(attr));
+    attr.application_id = application_id;
+    attr.uid = uid;
+    attr.save_data_type = FsSaveDataType_Account;
+
+    return fsOpenReadOnlySaveDataFileSystem(out, FsSaveDataSpaceId_User, &attr);
+}
+
 Result fsOpen_BcatSaveData(FsFileSystem* out, u64 application_id) {
     FsSaveDataAttribute attr;