If you’ve ever run out of space on your Android device, or wanted to transfer large files between two devices, this clever flash drive might be just what you’re looking for.

The popular SanDisk Ultra Dual is down to just $10 on Amazon today for Prime members. That’s a no-brainer purchase if you’ve ever filled up your phone with vacation photos, or wanted to transfer a movie between your phone and a tablet. One end is a microUSB plug, and the other is a standard USB, so you can plug it into most Android phones, tablets, and also computers.