I just bought diamond but i cant download anything

i just bought 1 month of diamond i have my flash drive plugged in with my profile on it but it still wont let me download anything. i wanted halo reach and gta 5 mods plz help

Are you getting any error message? What do you mean by it won’t let you download anything?

He’s attempting to get free games.

@OP - Horizon does not allow you to get free games, it only adds a GPD to your profile to make it look like you have the game so you can unlock achievements