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!! 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 About production site: China, South Korea, the Philippines! All products delivery randomly. 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 1.