Before I can really answer your question accurately, I need to know what you are trying to accomplish. Are you trying to move or copy? Are you working with a folder tree, multiple files, or a single file? The mv command has a lot of options.
If you are trying to sync a folder tree with multiple files in it to a usb stick, ie, keep a mirror backup, you might be better off using the rsync command. It only copies files that have changed and deletes files that have been deleted since the last backup, so it is very fast. It would work something like this:
Make a directory on the usb stick called say "office-backup" .
The rsync command would look like this:
sudo rsync -arE --progress --delete --timeout=120 --exclude "*~" --include "*" --include "*/**" /media/disk-2/office-backup/ /media/usb-bu/office-backup/office-backup
This command would copy all the files and folders in that tree except the machine generated backup files, and would maintain whatever permissions they had originally. It would also remove any files from the usb stick that no longer existed in the source folder tree. In other words it would maintain a mirror image, less the machine generated backups, of the /media/disk-2/office-backup/ folder tree.
This may not be what you wanted. It is just an example of the flexibility of the rsync command.
Like I said up front, I really need a better idea of what you are trying to accomplish in order to help you, instead of mislead you.
Insanity: Doing the same thing over and over and each time expecting a different result.
Democracy is 2 wolves and a lamb voting on the menu. Liberty is an armed lamb protesting the electoral outcome. A Republic negates the need for an armed protest.