Every hacker has a USB thumb drive on their keyring, filled with backup files and a way to boot up a broken computer. One feature that most are missing though is USB On The Go (OTG) support, which allows a USB device to act as a USB host, connecting to devices like cell phones and tablets.
That can be added with the addition of a USB OTG adapter, though, and [usbdevice] has produced a nice how-to on soldering one of these permanently into a USB thumb drive to create a more flexible device. It’s a simple solder-something-on-something-else hack, but it could be handy.
There are a few caveats, though: it needs a USB thumb drive with solderable headers, which most of the smallest drives that have connectors right on the PCB won’t have. Most of the larger drives will have these, though, and they are cheap, so finding a suitable victim isn’t hard.