SanDisk Original OTG USB Flash Drive 16GB 32GB 64GB 128GB (New Version) About product: Future:Original Sandisk/OTG USB3.0/USB Flash drive Performance read speed up to 150MB / s, write speed up to 90MB / s Size 0.59 inches x 0.43 x 0.03 inch (15 mm x 11 Haomi x 1.0 mm) of Operating temperature -13ºF to 185ºF (-25ºC to 85ºC) Storage temperature -40ºF to 185ºF (-40ºC to 85ºC) 1.Capacity 16GB = approximately 14GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB = approximately 119GB-120GB 256GB = approximately 224GB-240GB This is calculation difference between manufacturer and your PC, please Google 'Memory card capacity' to get more information. Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1GB = 1.00 Billion bytes.The pursuit of the perfect person is not recommended to buy. 2.Speed Test (1). The speed show on our link is test by Sandisk/Samsung or by our professional instrument, you'd better use 3.0 interface and 3.0 card reader, then you can get a nice speed. (2). Speed is influenced by many different factors, interface, computer condition, test software ,systems ,use , etc . (3). If you test a low speed by yourself, please donot worry, you can try another instrument to test(need 3.0 interface and 3.0 card reader). And if you always get the same low speed, you can retrun the goods, then we refund you all money. (4). We can 100% promise that our product are all 100% original, there is a security verification label on each package. (5). Once you place your order, it mean you had read and agree with my description. ***If you have any question, please email us. Customer satisfaction is very important to us! Please contact us before leaving any negative or neutral feedback. Please give us the opportunity to resolve the problem. We understand the concerns and frustrations you might have, and we will try our best to resolve the issues. Package should arrive in about 25 to 60 days after we have it shipped. Procesing time before shipping lasts 1-14 days. Factors such as holidays, delayed logistics and customs clearings may have an impact on the delivery time. Only standard shipping available. Ships to Everywhere except Kosovo. This product ships for FREE worldwide.