CMS 128GB mSATA 6GB/s Internal SSD MLC chip Compatible with Lenovo ThinkPad W520 Series - C29

SSD's are the modern version of the HDD or Hard Drive Disk. They do not rely on laser disks to read information and as such are able to read and write data at much faster speeds while saving power. They are more compact and are able to run on most modern DDR3 and DDR4 computers.