If you want to transfer a larger amount of data, the Seagate Backup Plus Slim 2TB Rose Gold external HDD is just what the doctor ordered, providing up to 2000 TB of space. This is enough to back up large amounts of HD and 4K content. 2.5" drives are designed mainly for people who want to have their data always at hand. One great thing about HDDs is their lower price and large storage capacity. On the flipside, these drives don't take shocks and bumps well. The Seagate external drive uses USB 3,0 (3,1 gen1) and Micro USB-B interface.