One of the most frustrating things to do is shuffle various USB drives trying to remember which one you were using last (for persistent OS boots), or which one has the working version of “X” operating system/which installer. This article covers how to take an external USB drive (whether a large thumb drive or an actual external hard drive) and turn it into a whizbang multi-OS booting device.
If you’re looking for a quick way to clean out unused drive space, Windows 7 and on have a built-in tool called Cipher that can handle that easily. To wipe all free space on a drive (the C: drive in the below example) just use the following syntax:
There are a lot of additional features to this tool (which you can review at the link above), but a scheduled task to wipe your free space on a regular basis can greatly reduce the probability of data recovery in the event your device is stolen. Consider it a standard part of your regular hygiene along with drive encryption.