Storage locations

TIL that if you have Steam in Big Picture Mode it doesn't include all settings, including the option to add additional storage locations to the system.

For context, I'm re-setting up my Ally X, and have added a 1tb MicroSD card. When I was installing games via Steam, it took me far longer than I'm proud of to figure out that you need to go back to the desktop mode to be able to add a new storage location.