Data Transfers · Setting up a transfer
Can I use Data Transfers to copy between two folders or drives on my Mac?
Short answer: Yes. Pick local folders or drives for both Source and Destination with the folder buttons. Copy, Move and both syncs all work locally — no cloud account needed.
Yes. Use the folder button on both fields to choose a folder on your Mac, your external drive or any other connected disk. Every operation works locally: Copy for a second copy, Sync (one-way) to keep a mirror of a folder on another drive, Bidirectional sync for two folders you edit, and Move to send files across and free the source.
If what you want is to free space on your Mac while keeping files reachable from their usual place, Data Parking is usually the better tool, because it leaves a shortcut behind.
Related: Data Transfers or Data Parking? · Moving folders