This will not work for Xbox One. There is no Lan option to pick from.Nice, thanks! Will be trying on Xbone shortly.
A 1-10 step by step tut would probably help a lot of people too.
Dees this look right to you?
1. Go to stash
2. Press Pause and hit Y to check session options, make sure Lan is selected.
3. Go into stash/inventory
4. Choose and move to but do not select the item you wish to dupe or one you have lots of
5. Remove ethernet cable
6. About 1 second later you will get a connection lost or error prompt, hit A JUST as it pops
7. If done right the prompt will disappear but item window will still be up
8. Press A to select item to dupe/store
9. Look for item in stash
10. Enjoy your duped items.