TRUSDA Flash Drive 64GB Metal Case USB 3.0 Thumb Drive High Speed Memory Stick Keychain Waterproof Shockproof U85 USB 3.0 - Fast USB 3.0 interface. Backwards compatible with USB 2.0. High Speed Read speeds up to 90-140MB/s and writes speeds up to 10-40MB/s. Easy to Use - Just plug and play with no complex operations. Quality & Durable - Advanced UDP flash chip and high quality integrated design stainless steel case ensures its Waterproof/ Dustproof/ Anti-static/ Anti-magnetic / High Temperature Resistant. Convenient - The stylish metal ring and its thumb size make it a perfect accessory for your keychains, briefcases or your badge holders.