Dick's gadget this week is the SanDisk Ultra Dual USB 3.0 Drive. If you push the lever in one direction, you'll get the MicroUSB end that you can plug into your phone and it will show up as an additional drive. Then when you get back to the computer, if you push the lever in the other direction, you'll get a standard USB 3.0 end. For 32GB, it is $9.97. The 64GB version is $17.
This is a great solution for Android phones that don't have SD card slots. It does require that the phone be OTG-enabled.