Is it compatable with Linux?
Or is this a windows/mac device?
You can use any external hard drive with Linux. You may need to reformat it - but even that is not certain. If you connect it and it works, you're done. In the unlikely event the drive is not recognized, most Linux distributions come with the program called Gparted pre-installed, which can take care of reformatting the drive. Any pre-loaded software on the external disk will almost certainly be Mac or Windows specific, and not usable for Linux - but the drive will work fine as external storage.