
The transferred data is the only folder in the root of the volume, apart from the Recycle Bin and (possibly the first time) System Volume Information (the only other obvious places to look for the phantom data). There are no other files or folders on the volume containing this 652GB.

This leaves 652GB worth of something filling the volume completely unaccounted for. Windows Explorer reported the folder with the transferred files as being just about 3TB. The file copy fails at about 3TB worth of files, with Windows Explorer on Server 2 reporting the destination 3.63TB Storage Space volume as being completely filled. Server 2 (Destination): Windows Server 2012 Essentials, 4TB (3.63 TB formatted) mirrored ReFS Storage Space, file integrity streams enabled.įile copying is done over the network from Server 1 using FastCopy with Verify enabled.

Storage Space contains 3.01TB worth of files, with 554GB free space. Server 1 (Source): Windows Server 2012 Essentials, 4TB (3.63 TB formatted) mirrored ReFS Storage Space, file integrity streams enabled. I'm trying to copy several terabytes from one server's 4TB Storage Space to another server's 4TB Storage Space, but the copy is failing due to the Storage Space on the second server running out of room with over 600GB of additional invisible phantom data.
