Revision history [back]

Most of ROS and gazebo install into /opt. While it's possible to mount /opt on a different disk, apt (the package manager) and other tools will assume that the disk is available every time you boot your computer, so using a removable drive is likely to cause unusual problems.

It's probably easier to install a second disk if your SSD is getting too small, or install Ubuntu and ROS together on the USB drive, so that everything stays on the same disk. (get a fast USB drive if you can; running your OS from a slow hard drive can really suck)