Storage Deck Upgrades, or SDU in short, is your key to growing your inventory in Borderlands 4, and this valuable currency can be slightly hard to find.
All SDU upgrades in Borderlands 4
Here’s the complete list of all SDU upgrades that you can find inside the game.
- Pistol Ammo (7 upgradeable levels)
- Assault Rifle Ammo (7 upgradeable levels)
- Sniper Rifle Ammo (7 upgradeable levels)
- Bank (8 upgradeable levels)
- SMG Ammo (7 upgradeable levels)
- Shotgun Ammo (7 upgradeable levels)
- Backpack (8 upgradeable levels)
- Lost Loot (8 upgradeable levels)
Every upgrade begins with 5 SDU, and the price rises with every step.
Which are the best SDU upgrades in Borderlands 4?
The best choice is between Bank and Backpack. Both upgrades allow you to get more loot. Between the two, I am more interested in improving the Bank. The default Backpack doesn’t have a large inventory, but you can mitigate that with a large Bank. Simply send the loot from your Backpack to your Bank, and free up more space.
Lost Loot is useful, but only in minimal situations. It comes to the rescue if you missed picking a Legendary, as the machine will save your loot. You can, and should, upgrade Lost Loot, but only after upgrading the Bank and the Backpack.
Weapons depend entirely on the setup you’re using. Assault rifles and SMGs have bigger ammo capacities by default (which makes sense since they use more), and it’s always beneficial to improve the ammo capacity of your Sniper rifles.
How to get SDU in Borderlands 4
When you unlock a Safehouse, you get SDU. Order Silos can also reward you with it. They can also be obtained by getting different collectibles spread around the map. The task is simple: explore the map, look into the corners, and hope to get lucky.
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