automouse13 wrote:drive never comes up in the file manager
This doesn't mean it's not recognized only that it's not mounted. If you plug the drive in then open a terminal, type lsusb
(lowercase) and press Enter, it will list all the USB devices seen by the system. If your drive is listed then it's recognized but may not be mountable. In that case try opening Disk Utility if it's in the menu, the drive should be listed there and you can mount or format it.