Many of us use our Android tablets or smartphones to get things done every day. If you store lots of files on your device, you may want to expand its memory. A USB drive with OTG functionality could certain help. The Kingston DataTraveler microDuo is a USB device you can connect to your tablet or smartphone to store large files. It has microUSB and USB 2.0 connectors. It is plug & play, so just connect it, and you are set. The 16 GB version sets you back $25.