Seagate 18TB Expansion Desktop USB 3.0 3.5 Inch External Hard Drive Seagate Expansion desktop drive, add-on storage for your PC and Mac. The Seagate Expansion desktop drive provides extra storage for your ever-growing collection of files. Add space for more files instantly, consolidate all your files to a single location, or free up space on your computers internal drive for improved performance. Set-up is straightforward. Simply plug in the included power supply and USB cable and you are ready to go. It is automatically recognised by the Windows or Mac operating system, so there is no software to install and nothing to configure. Saving files is easy too, just drag and drop. Take advantage of the fast data transfer speeds with the USB 3.0 interface by connecting to a USB 3.0 port. Plus, Seagate Expansion comes with Rescue Data Recovery Services for additional peace of mind.Please note this item is non-returnable, see our returns policy for more information.