How to Open All Bags at Once in WoW
By default, pressing the “B” key will open all of your bags.
However, if you’ve changed this key binding or mapped “B” to something else, you’ll need to revisit your key binding settings.
Updating Your Key Binding to Open All Bags
1. Click the Game Menu button in the bottom-right corner.
2. Click the “Key Bindings” button.
3. In the left-hand menu, select “Interface Panel”.
4. Find the “Open All Bags” command and any keys bound to it.
5. If necessary, change either of the keys bound to the command.
6. Use your new key bindings (or preexisting ones) to open all bags at once.