Usb 3.0 Flash Drive Transfer Speed. The original usb 30 speed reaches 50gbps 640mbs and its maximum output current is 5v900ma. Ive frequently had issues w the transfer speeds of usb 30 devices in windows 10.

As an example it may read like this. Then you can check if your external hard drive has become fast in speed. If your usb drive uses the 20 interface the usb transfer speed slow issue may happen.
When copying large files from my win 8 computer to an external hard drive the transfer speed is initially very high 100 mbs but after a short while drops to 20 30 mbs.
Itll occasionally spike to expected speeds of 15 30mbs but more often than not its frustratingly slow. Click the policies tab choose better performance and click ok to confirm all the changes. Just use the drive with usb 30 for data transfer in windows 1087. If your usb drive uses the 20 interface the usb transfer speed slow issue may happen.