Casmart The Flash Shaped USB Flash Drive (8GB) Real Capacity. Unlike those reprogrammed fake chips on the market, our USB flash drives has passed the H2testw test and is confirmed to have an actual capacity High Quality. Use A-class chip, can be erased repeatedly for 100,0000 times Waterproof. You don't need to get worried anymore when you accidentally drop this device into your coffee because it's waterproof OS Support: Windows XP/7/8/8.1, Mac OS X 10.5.0 or later, Linux Plug and play. Easy to carry around