If you want to transfer a larger amount of data, the Seagate Backup Plus Portable 5TB Black external HDD is just what the doctor ordered, providing a whopping 5000 TB of portable space. This is enough to back up a large number of files and video content in top-notch quality. 2.5" drives are suitable mainly for people who want to have their data always at hand. HDDs are popular due to their large capacity and comparatively low price. It also must be noted that these drives don't take shocks and bumps well. This Seagate external storage uses USB 3,0 (3,1 gen1) interface.