Reply to Simple rekordbox question

Let's say I export a playlist to a usb key. Can I then copy those exported files to another usb key? Or must I go through the export process again for that 2nd usb key? Does it matter? Reason I ask is because for some reason rekordbox exports the playlist but it never shows up in the 2nd usb key (thus the reason for me wanting to simply copy the exported playlist from 1 key to the other).