If you need to store a modest amount of data, a simple flash disk will do. An external disk, however, is large enough to let you backup your whole PC, even though it's not much larger in physical size . The drive SanDisk Extreme Portable SSD 1TB is a SSD. The acronym SSD means Solid State Drive, or a flash memory based disk. This type is considerably faster than the old hard disk and doesn't draw a lot of power.
External SSD disks are more expensive per 1GB than normal magnetic HDDs. Basic PC software plus some work-related documents can be fit on a 64GB drive, though 128GB would be better. But if you plan to put tons of software on your SSD, even 256GB could be too little.
SSDs typically deliver disk reading speeds of 550 MB/s. The amount of time it takes you to copy files is also affected by the interface, for example, USB 3.0 will always beat USB 2.0. This external disk uses a USB 3,1 (3,1 gen2) port.