For just $375.99 Please read carefully. Thank you!!! About SSD: SSD doesn't inclube SSD holder, SATA cable and screws. Only HDD Box:only HDD enclosure,not SSD(3.0 sata to USB) 120G is 850 evo ,250G-1T is 860 EVO !! Storage Space: 250GB = approximately 200GB-240GB 500GB = approximately 440GB-490GB 1TB = approximately 880GB-980GB Market Conversion 1GB=1.00 Billion Bytes, Computer Conversion 1GB=1.073741824 Billion Bytes. (Note: The market conversion for GB to Bytes slightly varies. Google "Memory Card Capacity" for more information.) 860 EVO Specifications Capacity: 250G 500G 1TB(*Actual usable capacity may be less,due to formatting, partitioning, operating system, applications or otherwise) Interface: 2.5', SATA3 6Gb/s(compatible with SATA2 , SATA1,to drop speed ) Controller: SAMSUNG MJX Performances Speed (different test softwares will get different speed , speed will be affected by many different factors , our datas only as reference) 250G 500G 1TB Speed (ATTO): Sequential Read Speed: Up to 550MB/s; Sequential Write Speed:Up to 520 MB/s. Notice: 1, The test result is base on sataIII interface,sataIII sata cable,desktop and SSD empty status , different computer and software (include software version), the result may different . 2, Difference between SATA I, SATA II and SATA III SATA I (revision 1.x) interface, formally known as SATA 1.5Gb/s , is the first generation SATA interface running at 1.5 Gb/s. Max speed 150MB/s. SATA II (revision 2.x) interface, formally known as SATA 3Gb/s, is a second generation SATA interface running at 3.0 Gb/s. Max speed 250MB/s. SATA III (revision 3.x) interface, formally known as SATA 6Gb/s, is a third generation SATA interface running at 6.0Gb/s. Max speed 550MB/s. This interface is backwards compatible with SATA 3 Gb/s interface. If sata3.0 SSD tested speed on sata2.0 interface and sata cable the result will be inaccurate. 3,According to the international stander 1000KB=1MB ,the real capacity =Capacity x 0.93, please n...