Game Pass says my storage is full, but i have 175Gb of free space (Error Code 0x80073cf4)

I had this issue recently, where I thought it was using the external drive, but it was installing to the internal. I had to change the default, reset, change the default back, reset and then it worked fine.

Not a stupid question

i do have more then one drive, and i have checked to make sure i'm using the right one. I've set it as my default, and other games i have downloaded have gone to that drive with no issues

Maybe a stupid questions, but: Have you more than one drive on your PC? Are you sure you are using the right drive?

Also this first started with storage space being ”too full”. If this helps for any solution to the problem. I had around 80% of my storage space full on my Xbox and I tried clearing space local saved stuff. I don't know all the mumbo jumbo but I tried
that and then the problem persisted after that. So I deleted all my games and downloaded a couple to only have a few. Then work my way back up. Then when I tried downloading more it kept saying installation stopped right in the middle of downloading. After
that I only had around 4 games on my Xbox. Some I couldn't even open or play because it would give me an error for taking too long to start. Asking me to uninstall and then install the game again. I just now was finally able to restore my Xbox to factory settings
again with all games deleted. Then when I tried downloading ONE game it gave me the same issues of installation stopping then saying that my storage space is full and to delete local save files in order to play. With around 4% of storage space taken on the
hard drive.

After reading the support page (HERE) it looks like one of the things that can cause this error is not having enough storage space. If you go to Settings > System
> Storage please let me know how much free space you have in your storage devices.