The Goodram M400-0040R11 is a 2.5" Internal Solid State Drive (SSD) ideally suited for laptop PCs and other computing appliances. It features a storage capacity of 400 GB, a SATAIII Interface, and a sequential read speed of up to 550 MB/s and sequential write speed of up to 500 MB/s. It is based on a MLC NAND flash memory, supports power management features, and has numerous built-in features such as wear leveling, ECC, TRIM support, S.M.A.R.T., and more. The M400-0040R11 is a good choice for an upgrade as it offers fast performance and reliable data storage.