Please place the order correctly and sign to confirm receipt in time. If the package is returned due to the buyer, the shipping fee bear with the buyer!! Product Details: Enjoy the performance improvement of SSD SanDisk SSD Enhanced Edition Give your computer a new life Up to 20 times faster speed performance than your old mechanical hard drive Capacity: 250GB / 500GB / 1TB / 2TB Read Speed: up to 550 MB/s Write Speed: up to 525 MB/s Interface: SATA Revision 3.0 (6 Gb/s) About capacity: 250GB=approximately 200GB-240GB 256GB=approximately 210GB-245GB 500GB=approximately 440GB-490GB 512GB=approximately 450GB-500GB 1TB=approximately 880GB-980GB 2TB=approximately 1760GB-1960GB 1MB=1000KB. Warm Tips: About Speed: different test softwares will get different speed , speed will be affected by many different factors , our datas only as reference Notice: Our Store offers 100% tested products. If you have any question please feel free to contact us. Package list :(Send by your choose) SSD x 1Sandisk Internal Solid State Drive ULTRA 3D SSD 250GB 500GB 1TB 2TB 2.5 inch SATA III HDD Hard Disk HD SSD for Notebook PC