Move stored data to another disk

I store data on a virtual proxmox disk and now I need to move out to a real usb 3 disk.
Which is the procedure? I can copy and paste the files?

use some syncing methid, like rsync, first of all you sync data when it online, then stop node and sync it again, then downtime will be small. if you just copy data, you need hold node offline all the time. And copy can take day or more, depend on how many data you have.