I’m not sure if these methods work on Xbox, it might be different steps. These duplication methods work as of November 2021. These glitches have been around for a while but I find my way to be the quickest and simplest of the stash glitches. One method duplicates 1 stack of supplies/throwables/packs etc. or 1 weapon of choice. The second method duplicates the first 4-8 items in your stash all at once but is limited to what is at the top of your stash. If you follow these steps exactly, you will not crash your game.