diff --git a/src/LibHac/Fs/Impl/SaveDataMetaPolicy.cs b/src/LibHac/Fs/Impl/SaveDataMetaPolicy.cs
index 6492747a..50cfdcd4 100644
--- a/src/LibHac/Fs/Impl/SaveDataMetaPolicy.cs
+++ b/src/LibHac/Fs/Impl/SaveDataMetaPolicy.cs
@@ -40,4 +40,24 @@ internal readonly struct SaveDataMetaPolicy
         GenerateMetaInfo(out SaveDataMetaInfo metaInfo);
         return metaInfo.Type;
     }
+}
+
+internal readonly struct SaveDataMetaPolicyForSaveDataTransfer
+{
+    private readonly SaveDataMetaPolicy _base;
+
+    public SaveDataMetaPolicyForSaveDataTransfer(SaveDataType saveType) => _base = new SaveDataMetaPolicy(saveType);
+    public void GenerateMetaInfo(out SaveDataMetaInfo metaInfo) => _base.GenerateMetaInfo(out metaInfo);
+    public long GetSaveDataMetaSize() => _base.GetSaveDataMetaSize();
+    public SaveDataMetaType GetSaveDataMetaType() => _base.GetSaveDataMetaType();
+}
+
+internal readonly struct SaveDataMetaPolicyForSaveDataTransferVersion2
+{
+    private readonly SaveDataMetaPolicy _base;
+
+    public SaveDataMetaPolicyForSaveDataTransferVersion2(SaveDataType saveType) => _base = new SaveDataMetaPolicy(saveType);
+    public void GenerateMetaInfo(out SaveDataMetaInfo metaInfo) => _base.GenerateMetaInfo(out metaInfo);
+    public long GetSaveDataMetaSize() => _base.GetSaveDataMetaSize();
+    public SaveDataMetaType GetSaveDataMetaType() => _base.GetSaveDataMetaType();
 }
\ No newline at end of file
diff --git a/src/LibHac/FsSrv/Impl/SaveDataMover.cs b/src/LibHac/FsSrv/Impl/SaveDataMover.cs
index dcdd47d6..9a8dd216 100644
--- a/src/LibHac/FsSrv/Impl/SaveDataMover.cs
+++ b/src/LibHac/FsSrv/Impl/SaveDataMover.cs
@@ -1,16 +1,25 @@
-// ReSharper disable UnusedMember.Local UnusedType.Local
-#pragma warning disable CS0169 // Field is never used
-using System;
+using System;
+using System.Runtime.CompilerServices;
 using LibHac.Common;
 using LibHac.Common.FixedArrays;
+using LibHac.Diag;
 using LibHac.Fs;
+using LibHac.Fs.Impl;
 using LibHac.FsSrv.Sf;
 using LibHac.Os;
 using LibHac.Sf;
 using LibHac.Util;
+using IFileSystem = LibHac.Fs.Fsa.IFileSystem;
+using IStorage = LibHac.Fs.IStorage;
 
 namespace LibHac.FsSrv.Impl;
 
+/// <summary>
+/// Bulk moves save data from one save data space to another.
+/// </summary>
+/// <remarks><para>To use this class, call <see cref="Register"/> for each save data to be moved. After all save data
+/// have been registered, repeatedly call <see cref="Process"/> until it returns 0 for the remaining size.</para>
+/// <para>Based on nnSdk 18.3.0 (FS 18.0.0)</para></remarks>
 public class SaveDataMover : ISaveDataMover
 {
     private enum State
@@ -25,13 +34,13 @@ public class SaveDataMover : ISaveDataMover
 
     private SharedRef<ISaveDataTransferCoreInterface> _transferInterface;
     private Optional<StorageDuplicator> _duplicator;
-    private SaveDataSpaceId _sourceSpaceId;
-    private Array128<ulong> _sourceSaveIds;
-    private SaveDataSpaceId _destinationSpaceId;
-    private Array128<ulong> _destinationSaveIds;
+    private SaveDataSpaceId _srcSpaceId;
+    private Array128<ulong> _srcSaveIds;
+    private SaveDataSpaceId _dstSpaceId;
+    private Array128<ulong> _dstSaveIds;
     // private TransferMemory _transferMemory;
     private Memory<byte> _workBuffer;
-    // private ulong _transferMemorySize;
+    private ulong _transferMemorySize;
     private int _saveCount;
     private int _currentSaveIndex;
     private long _remainingSize;
@@ -42,46 +51,377 @@ public class SaveDataMover : ISaveDataMover
         SaveDataSpaceId sourceSpaceId, SaveDataSpaceId destinationSpaceId, NativeHandle transferMemoryHandle,
         ulong transferMemorySize)
     {
-        throw new NotImplementedException();
+        _transferInterface = SharedRef<ISaveDataTransferCoreInterface>.CreateCopy(in transferInterface);
+        _duplicator = new Optional<StorageDuplicator>();
+
+        _srcSpaceId = sourceSpaceId;
+        _srcSaveIds = default;
+        _dstSpaceId = destinationSpaceId;
+        _dstSaveIds = default;
+
+        // Missing: Attach transfer memory
+
+        _workBuffer = default;
+        _transferMemorySize = transferMemorySize;
+        _saveCount = 0;
+        _currentSaveIndex = 0;
+        _remainingSize = 0;
+        _state = State.Initial;
+        _mutex = new SdkMutex();
+        transferMemoryHandle.Detach();
     }
 
     public void Dispose()
     {
-        throw new NotImplementedException();
+        // Missing: Destroy transfer memory
+
+        if (_duplicator.HasValue)
+        {
+            _duplicator.Value.Dispose();
+            _duplicator.Clear();
+        }
+
+        _transferInterface.Destroy();
     }
 
     private Result OpenDuplicator()
     {
-        throw new NotImplementedException();
+        Result res;
+
+        using var srcFileStorage = new SharedRef<IStorage>();
+        using (var srcInternalStorageAccessor = new SharedRef<SaveDataInternalStorageAccessor>())
+        {
+            res = SaveDataTransferUtilityGlobalMethods.OpenSaveDataInternalStorageAccessor(null,
+                ref srcInternalStorageAccessor.Ref, _srcSpaceId, _srcSaveIds[_currentSaveIndex]);
+            if (res.IsFailure()) return res.Miss();
+
+            res = srcInternalStorageAccessor.Get.Initialize(coreInterface: _transferInterface.Get,
+                isTemporaryTransferSave: false, hashSalt: default);
+            if (res.IsFailure()) return res.Miss();
+
+            res = srcInternalStorageAccessor.Get.OpenConcatenationStorage(ref srcFileStorage.Ref);
+            if (res.IsFailure()) return res.Miss();
+        }
+
+        using var dstFileStorage = new SharedRef<IStorage>();
+        using var dstFs = new SharedRef<IFileSystem>();
+        using (var dstInternalStorageAccessor = new SharedRef<SaveDataInternalStorageAccessor>())
+        {
+            res = SaveDataTransferUtilityGlobalMethods.OpenSaveDataInternalStorageAccessor(null,
+                ref dstInternalStorageAccessor.Ref, _dstSpaceId, _dstSaveIds[_currentSaveIndex]);
+            if (res.IsFailure()) return res.Miss();
+
+            res = dstInternalStorageAccessor.Get.Initialize(coreInterface: _transferInterface.Get,
+                isTemporaryTransferSave: false, hashSalt: default);
+            if (res.IsFailure()) return res.Miss();
+
+            res = dstInternalStorageAccessor.Get.OpenConcatenationStorage(ref dstFileStorage.Ref);
+            if (res.IsFailure()) return res.Miss();
+
+            using SharedRef<IFileSystem> fs = dstInternalStorageAccessor.Get.GetSaveDataInternalFileSystem();
+            dstFs.SetByMove(ref fs.Ref);
+        }
+
+        _duplicator.Set(new StorageDuplicator(in srcFileStorage, in dstFileStorage, in dstFs));
+        res = _duplicator.Value.Initialize();
+        if (res.IsFailure()) return res.Miss();
+
+        return Result.Success;
     }
 
     private Result Initialize()
     {
-        throw new NotImplementedException();
+        // Missing: Map transfer memory
+
+        _remainingSize = 0;
+        for (int i = 0; i < _saveCount; i++)
+        {
+            Result res = _transferInterface.Get.ReadSaveDataFileSystemExtraDataCore(out SaveDataExtraData srcExtraData,
+                _srcSpaceId, _srcSaveIds[i], isTemporarySaveData: false);
+            if (res.IsFailure()) return res.Miss();
+
+            if (!SaveDataProperties.IsValidSpaceIdForSaveDataMover(srcExtraData.Attribute.Type, _dstSpaceId))
+                return ResultFs.InvalidArgument.Log();
+
+            if (_srcSpaceId == _dstSpaceId)
+                return ResultFs.InvalidArgument.Log();
+
+            Unsafe.SkipInit(out IntegrityParam integrityParam);
+
+            using (var srcInternalStorageAccessor = new SharedRef<SaveDataInternalStorageAccessor>())
+            {
+                res = SaveDataTransferUtilityGlobalMethods.OpenSaveDataInternalStorageAccessor(null,
+                    ref srcInternalStorageAccessor.Ref, _srcSpaceId, _srcSaveIds[_currentSaveIndex]);
+                if (res.IsFailure()) return res.Miss();
+
+                res = srcInternalStorageAccessor.Get.Initialize(coreInterface: _transferInterface.Get,
+                    isTemporaryTransferSave: false, hashSalt: default);
+                if (res.IsFailure()) return res.Miss();
+
+                res = srcInternalStorageAccessor.Get.GetIntegrityParam(ref integrityParam);
+                if (res.IsFailure()) return res.Miss();
+
+                using var srcFileStorage = new SharedRef<IStorage>();
+                res = srcInternalStorageAccessor.Get.OpenConcatenationStorage(ref srcFileStorage.Ref);
+                if (res.IsFailure()) return res.Miss();
+
+                res = srcFileStorage.Get.GetSize(out long size);
+                if (res.IsFailure()) return res.Miss();
+
+                _remainingSize += size;
+            }
+
+            SaveDataAttribute attribute = srcExtraData.Attribute;
+            res = SaveDataCreationInfo.Make(out SaveDataCreationInfo creationInfo, srcExtraData.DataSize,
+                srcExtraData.JournalSize, srcExtraData.OwnerId, srcExtraData.Flags, _dstSpaceId);
+            if (res.IsFailure()) return res.Miss();
+
+            new SaveDataMetaPolicyForSaveDataTransferVersion2(srcExtraData.Attribute.Type).GenerateMetaInfo(out SaveDataMetaInfo metaInfo);
+
+            res = _transferInterface.Get.CreateSaveDataFileSystemCore(in attribute, in creationInfo, in metaInfo,
+                new Optional<HashSalt>(in integrityParam.IntegritySeed), leaveUnfinalized: true);
+            if (res.IsFailure()) return res.Miss();
+
+            res = _transferInterface.Get.GetSaveDataInfo(out SaveDataInfo info, _dstSpaceId, attribute);
+            if (res.IsFailure()) return res.Miss();
+
+            _dstSaveIds[i] = info.SaveDataId;
+        }
+
+        return OpenDuplicator().Ret();
     }
 
     public Result Register(ulong saveDataId)
     {
-        throw new NotImplementedException();
+        bool isSuccess = false;
+
+        try
+        {
+            using var scopedLock = new ScopedLock<SdkMutex>(ref _mutex);
+
+            if (_saveCount >= _srcSaveIds.Length)
+                return ResultFs.PreconditionViolation.Log();
+
+            switch (_state)
+            {
+                case State.Initial:
+                case State.Registered:
+                    _srcSaveIds[_saveCount] = saveDataId;
+                    _saveCount++;
+                    _state = State.Registered;
+
+                    isSuccess = true;
+                    return Result.Success;
+                case State.Copying:
+                case State.Finished:
+                case State.Fatal:
+                case State.Canceled:
+                    return ResultFs.PreconditionViolation.Log();
+                default:
+                    Abort.UnexpectedDefault();
+                    return Result.Success;
+            }
+        }
+        finally
+        {
+            if (!isSuccess)
+                ChangeStateToFatal();
+        }
     }
 
-    public Result Process(out long remainingSize, long sizeToProcess)
+    public Result Process(out long outRemainingSize, long sizeToProcess)
     {
-        throw new NotImplementedException();
+        UnsafeHelpers.SkipParamInit(out outRemainingSize);
+        bool isSuccess = false;
+
+        try
+        {
+            using var scopedLock = new ScopedLock<SdkMutex>(ref _mutex);
+
+            if ((long)_transferMemorySize < sizeToProcess)
+                return ResultFs.InvalidSize.Log();
+
+            Result res;
+            switch (_state)
+            {
+                case State.Initial:
+                    return ResultFs.PreconditionViolation.Log();
+                case State.Registered:
+                    res = Initialize();
+                    if (res.IsFailure()) return res.Miss();
+
+                    _state = State.Copying;
+                    goto case State.Copying;
+                case State.Copying:
+                    Assert.SdkAssert(!_workBuffer.IsEmpty);
+                    Span<byte> workBuffer = _workBuffer.Span.Slice(0, (int)_transferMemorySize);
+
+                    // Call the current duplicator with a size of zero to get the remaining size for this save before processing
+                    res = _duplicator.Value.ProcessDuplication(out long remainingSizeBefore, workBuffer, 0);
+                    if (res.IsFailure()) return res.Miss();
+
+                    res = _duplicator.Value.ProcessDuplication(out long remainingSize, workBuffer, sizeToProcess);
+                    if (res.IsFailure()) return res.Miss();
+
+                    // Update the total remaining size with how much data was processed in this iteration
+                    _remainingSize -= remainingSizeBefore - remainingSize;
+
+                    if (remainingSize == 0)
+                    {
+                        // When finished copying this save, finalize and close the duplicator
+                        res = _duplicator.Value.FinalizeObject();
+                        if (res.IsFailure()) return res.Miss();
+
+                        _duplicator.Value.Dispose();
+                        _duplicator.Clear();
+
+                        // Copy the extra data from the old save to the new save
+                        res = _transferInterface.Get.ReadSaveDataFileSystemExtraDataCore(out SaveDataExtraData extraData,
+                            _srcSpaceId, _srcSaveIds[_currentSaveIndex], isTemporarySaveData: false);
+                        if (res.IsFailure()) return res.Miss();
+
+                        res = _transferInterface.Get.WriteSaveDataFileSystemExtraDataCore(_dstSpaceId,
+                            _dstSaveIds[_currentSaveIndex], in extraData, extraData.Attribute.Type,
+                            updateTimeStamp: false);
+                        if (res.IsFailure()) return res.Miss();
+
+                        if (_currentSaveIndex == _saveCount - 1)
+                        {
+                            // If this was the last save to copy, finalize the entire move operation
+                            FinalizeObject().IgnoreResult();
+                            _state = State.Finished;
+                        }
+                        else
+                        {
+                            // If there are still saves to copy, open the duplicator for the next one
+                            _currentSaveIndex++;
+
+                            res = OpenDuplicator();
+                            if (res.IsFailure()) return res.Miss();
+                        }
+                    }
+
+                    outRemainingSize = _remainingSize;
+                    isSuccess = true;
+
+                    return Result.Success;
+                case State.Finished:
+                    outRemainingSize = 0;
+                    isSuccess = true;
+
+                    return Result.Success;
+                case State.Fatal:
+                    return ResultFs.PreconditionViolation.Log();
+                case State.Canceled:
+                    return ResultFs.PreconditionViolation.Log();
+                default:
+                    Abort.UnexpectedDefault();
+                    return Result.Success;
+            }
+        }
+        finally
+        {
+            if (!isSuccess)
+                ChangeStateToFatal();
+        }
     }
 
     private Result FinalizeObject()
     {
-        throw new NotImplementedException();
+        Assert.SdkAssert(_mutex.IsLockedByCurrentThread());
+
+        Result res = SetStates(_dstSpaceId, _dstSaveIds, SaveDataState.Normal);
+        if (res.IsFailure()) return res.Miss();
+
+        res = SetStates(_srcSpaceId, _srcSaveIds, SaveDataState.Processing);
+        if (res.IsFailure()) return res.Miss();
+
+        for (int i = 0; i < _saveCount; i++)
+        {
+            res = _transferInterface.Get.DeleteSaveDataFileSystemBySaveDataSpaceId(_srcSpaceId, _srcSaveIds[i]);
+            if (res.IsFailure()) return res.Miss();
+        }
+
+        _state = State.Finished;
+        return Result.Success;
+
+        Result SetStates(SaveDataSpaceId spaceId, ReadOnlySpan<ulong> saveDataIds, SaveDataState state)
+        {
+            using var accessor = new UniqueRef<SaveDataIndexerAccessor>();
+            Result r = _transferInterface.Get.OpenSaveDataIndexerAccessor(ref accessor.Ref, spaceId);
+            if (r.IsFailure()) return r.Miss();
+
+            ReadOnlySpan<ulong> ids = saveDataIds.Slice(0, _saveCount);
+            for (int i = 0; i < ids.Length; i++)
+            {
+                r = accessor.Get.GetInterface().SetState(ids[i], state);
+                if (r.IsFailure()) return r.Miss();
+            }
+
+            r = accessor.Get.GetInterface().Commit();
+            if (r.IsFailure()) return r.Miss();
+
+            return Result.Success;
+        }
     }
 
     public Result Cancel()
     {
-        throw new NotImplementedException();
+        Result DoCancel()
+        {
+            _duplicator.Value.Dispose();
+            _duplicator.Clear();
+
+            Result result = Result.Success;
+
+            for (int i = 0; i < _saveCount; i++)
+            {
+                Result res = _transferInterface.Get.DeleteSaveDataFileSystemBySaveDataSpaceId(_dstSpaceId, _dstSaveIds[_saveCount]);
+                if (!res.IsSuccess() && !ResultFs.TargetNotFound.Includes(res))
+                {
+                    if (result.IsSuccess())
+                        result = res;
+                }
+            }
+
+            _state = State.Canceled;
+            return result.Ret();
+        }
+
+        using var scopedLock = new ScopedLock<SdkMutex>(ref _mutex);
+
+        switch (_state)
+        {
+            case State.Initial:
+            case State.Registered:
+            case State.Copying:
+            case State.Fatal:
+                return DoCancel().Ret();
+            case State.Finished:
+            case State.Canceled:
+                return ResultFs.PreconditionViolation.Log();
+            default:
+                Abort.UnexpectedDefault();
+                return Result.Success;
+        }
     }
 
     private void ChangeStateToFatal()
     {
-        throw new NotImplementedException();
+        switch (_state)
+        {
+            case State.Initial:
+            case State.Registered:
+            case State.Copying:
+                _state = State.Fatal;
+                break;
+            case State.Finished:
+            case State.Fatal:
+            case State.Canceled:
+                break;
+            default:
+                Abort.UnexpectedDefault();
+                break;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/LibHac/FsSrv/Impl/SaveDataTransferUtility.cs b/src/LibHac/FsSrv/Impl/SaveDataTransferUtility.cs
index 91763492..6f56580c 100644
--- a/src/LibHac/FsSrv/Impl/SaveDataTransferUtility.cs
+++ b/src/LibHac/FsSrv/Impl/SaveDataTransferUtility.cs
@@ -329,7 +329,8 @@ public static partial class SaveDataTransferUtilityGlobalMethods
     public static Result OpenSaveDataInternalStorageAccessor(this FileSystemServer fsSrv,
         ref SharedRef<SaveDataInternalStorageAccessor> outAccessor, SaveDataSpaceId spaceId, ulong saveDataId)
     {
-        throw new NotImplementedException();
+        outAccessor.Reset(new SaveDataInternalStorageAccessor(spaceId, saveDataId));
+        return Result.Success;
     }
 
     public static Result CommitConcatenatedSaveDataStorage(this FileSystemServer fsSrv, IFileSystem fileSystem,
diff --git a/src/LibHac/FsSrv/Sf/ISaveDataMover.cs b/src/LibHac/FsSrv/Sf/ISaveDataMover.cs
index 445c8084..8c5c7077 100644
--- a/src/LibHac/FsSrv/Sf/ISaveDataMover.cs
+++ b/src/LibHac/FsSrv/Sf/ISaveDataMover.cs
@@ -2,9 +2,15 @@
 
 namespace LibHac.FsSrv.Sf;
 
+/// <summary>
+/// Bulk moves save data from one save data space to another.
+/// </summary>
+/// <remarks><para>To use this class, call <see cref="Register"/> for each save data to be moved. After all save data
+/// have been registered, repeatedly call <see cref="Process"/> until it returns 0 for the remaining size.</para>
+/// <para>Based on nnSdk 18.3.0 (FS 18.0.0)</para></remarks>
 public interface ISaveDataMover : IDisposable
 {
     Result Register(ulong saveDataId);
-    Result Process(out long remainingSize, long sizeToProcess);
+    Result Process(out long outRemainingSize, long sizeToProcess);
     Result Cancel();
 }
\ No newline at end of file