SnapRAID - Disks - Move files from one disk to another

the 100% safe way to proceed is:

Copy the files to the new location.
Run a 'diff' command to verify that the just copied files are correctly identified as 'copy'.
Run a 'sync' command.
Delete the files from the original location.
Run again a 'sync' command.

NOTE: This process gives the guarantee that even if disks die during the sync process, everything will be able to be recovered.

It also verifies that the hashes of all the moved files are matching the original ones.