You can wipe it from desktop mode. open up kde partition manager and just delete it and hit apply, then go back to gaming mode and format it.
if that doesn’t work you can kinda force it by doing the same thing but after deleting it create a new partition, I’d do ext. then you have to add the drive manually via steam in desktop mode. I think it’s settings > storage, clck the drop down and hit the + to add it.
I got the tracking number, but it’s not active with carrier yet/ :(