A solid-state drive, or SSD, is a type of computer storage device. This non-volatile storage medium uses solid-state flash memory to store persistent data. Traditional hard disc drives (HDDs) are being replaced in computers by SSDs, which perform the same basic operations as a hard drive. SSDs, on the other hand, are substantially faster. Upgrade your PC with 128GB Planet SSD. The SATA SSD lets you feel the difference with super-fast OS boot times and application loads.