PLUG 21 Reliable: with no moving parts, solid-state drives are less likely to fail than standard hard drives Economical: design optimized to make migrating to an SSD more affordable Capacity: 120GB, Interface: SATA Rev. 3.0 (6Gb/s) - with backwards compatibility to SATA Rev. 2.0. 120GB - 180MB/s Read and 133MB/s Write.