Please Help

when i used to load up horizon without diamond it would come up with all my stuff, easy as pie. but now after i got diamond it doesn’t show a single piece of data on the bar. Nothing! i have my usb stick plugged in but it just doesn’t seem to find it, or if it does it doesn’t show it there, ready to mod. please help, i just spent £60 and i can’t even find my files to mod, even though it could before i got diamond

Nothing related to the way Horizon loads and reads flash drives is changed when upgrading to Diamond. Did you update Horizon in between last using the device explorer successfully and going Diamond? Did you do anything on your Xbox?

Have you done anything on your USB or your pc?
Because buying Diamond doesn’t change the program, it changes your account so you can use every feature.