> It has something to do with the filesystem attributes. Synology can do all the attributes the HFS+/APFS can do. They do not use standard samba *_xattr module

> It has something to do with the filesystem attributes. Synology can do all the attributes the HFS+/APFS can do. They do not use standard samba *_xattr modules though, they use their own and the result is all the @eaDir stuff. Do not delete it! On the other hand, Time Machine is perfectly capable of damaging its archive on the local drive just fine.