Description Speed: (256GB) :Read up to 130MB/S, Write up to 40MB/S. Data speed from HP / PNY official website. The speed depends on the host device, the interface, the conditions of use and the type of your device.Feature: Support system: Windows 7,8,10,11.Mac OS: 10.3 and above. Support device: Android phone(with OTG function). Macbook / Computer / Laptop / TV / TV Box / Car Media Player and etc. About using : Plug and play (no software required) / Some smartphones need an adapted application. Interface type : USB3.1 / USB2.0 (compatible) / Type-C. Safety: Dustproof, shockproof, waterproof . Full metal body. Operating temperature (0 ° C to 60 ° C). Storage temperature (-25º C to 80º C). DCVcc Power DC 4.5-5.5 V. Size X5200M : 60.8×13.3×7.5mm / Weight 15.2g (net weight).About capacity 32GB approximately 28GB-30GB 64GB approximately 56GB-60GB 128GB approximately 115GB-119GB 256 GB approximately 238 GB Vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated, but operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB. Therefore, there are some differences Speed: . (256GB) :Read up to 130MB/S, Write up to 40MB/S. Data speed from HP / PNY official website. The speed depends on the host device, the interface, the conditions of use and the type of your device. Feature: Support system: Windows 7,8,10,11.Mac OS: 10.3 and above. Support device: Android phone(with OTG function). Macbook / Computer / Laptop / TV / TV Box / Car Media Player and etc. About using : Plug and play (no software required) / Some smartphones need an adapted application. Interface type : USB3.1 / USB2.0 (compatible) / Type-C. Safety: Dustproof, shockproof, waterproof . Full metal body. Operating temperature (0 ° C to 60 ° C). Storage temperature (-25º C to 80º C). DCVcc Power DC 4.5-5.5 V. Size X5200M : 60.8×13.3×7.5mm / Weight 15.2g (net weight). About capacity 32GB approximately 28GB-30GB 64GB approximately 56GB-60GB 128GB approximately 115GB-119GB 256 GB approximately 238 GB Vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated, but operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB. Therefore, there are some differences between display capacity and nominal capacity of flash memory products. Related