Steam offers a method to backup your current library with relative ease, so long as you have a spare drive big enough for the backup and a couple hours to kill.

If you want to move Steam, Epic, Origin, or Uplay games from one PC to another computer successfully, follow the instructions in this post.

If your hard drive is running out of space, you can move your collection of PC games to a different drive. Here's how to set up the move from your game client of choice.

How to Move Steam Games to another Drive. PS: Also, see how you can change the default Program Files installation directory location or Pick a Drive for installation in Microsoft Store before ...

The change patches one of Steam's shortcomings and should make it easier to manage sprawling game libraries or free up disk space.