CMS 1TB 2.5-inch internal SSD Compatible with Dell Inspiron 17 (3780), Inspiron 17 (3781), Inspiron 17 (3785), Inspiron 17 (5770) - D18

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.