The Seagate STDR4000200 Backup Plus 4TB USB 3.0 Portable Hard Drive provides extra storage space for saving data, thereby freeing up your computer’s built in HDD. Compact dimensions of 114.50 x 78 x 20.5mm and a weight of 246g makes this device extremely portable. The Seagate Backup Plus hard drive provides you with a storage capacity of up to 4TB.