Description Tips: Flash memory vendors are using decimal arithmetic:1MB = 1000KB,1G = 1000MB calculated, the operating system using binary arithmetic:1MB = 1024KB,1GB = 1024MB; so there are some differences between display capacity and nominal capacity of flash memory product 64G is about 59.5G; Sellers experience: The first time I saw this product ,I was shocked ,because it s really interesting ,but after use it , I feel it s not just interesting but very useful . My phone installed a lot of Apps and there are many photos inside , phone memory is not enough ,but after use this i-flash , All problems solved! 1. I moved most of old photos to the i-flash Device, my phone have more space to store new photos (It can be directly connected to the phone and move the photo in the phone to the i-flash ). 2. I can see the movie in the i-flash ,it as a extra memory of the phone , I can use it to see the movie inside ,it s really cool ! 3. When I travel work, I can open the Word/Excel/Power point /PDF inside to check the quotes and information,Super Uesful ! (this i-flash deveice support nearly 40 files type ^_^)