Seagate Expansion hardisk is really portable and a value of money it gives a really good performence when plugedin with a good copying and moving speed and gives 976Gb which is really good storage .It’s black design looks really cool and the price is such which is affordable .The Seagate Backup Plus comes in three variants – 500GB, 1TB and 2TB. . It houses the Seagate ST1000LM024 1TB laptop drive which has a 5400PRM drive and 8MB of cache memory. The Backup Plus drive has a USB 3.0 interface. The main feature of the Backup Plus drive lies in its name.