When swapping my cache drive for a new one, i encountered a issue when moving data off my cache disk to the array with the mover. Lot of files did not get moved by the mover due a "does not exist" notice and No such file or directory. Workaround: I had to move the files manually in the terminal. Files where not locked, neither where there permission issues. Example: /mnt/user/appdata/linuxserver-plex/Library/Application Support/Plex Media Server/Metadata/TV Shows/8/145fa310d3a