Storage Deck Upgrades (SDU) allow you to increase the amount you can carry with you in Borderlands 2. You can purchase these SDUs with Eridium from Crazy Earl. His Black Market shop is located in the main HUB town, Sanctuary.
SDU TYPES
Here you can find which types of storage deck upgrades there are, how much capacity they add to your inventory, and how many SDUs you can buy from each.
| Type | Default Capacity | Capacity Increase | SDUs |
|---|---|---|---|
| Pistol | 200 Ammo | + 100 Pistol Ammo | 7 |
| Shotgun | 80 Ammo | + 20 Shotgun Ammo | 7 |
| SMG | 360 Ammo | + 180 SMG Ammo | 7 |
| Assault Rifle | 280 Ammo | + 140 AR Ammo | 7 |
| Sniper | 48 Ammo | + 12 Sniper Ammo | 7 |
| Heavy Weapon | 12 Ammo | + 3 Launcher Ammo | 7 |
| Backpack | 12 Slots | + 3 Backpack Slots | 9 |
| Bank | 6 Slots | + 2 Bank Space | 9 |
SDU Cost
Purchasing Storage Deck Upgrades costs Eridium, which is initially a rare currency in Borderlands 2, however, you will be able to get a good amount later on in the game.
| 1 White | 2 Green | 3 Blue | 4 Purple | 5 Orange | 6 Pink | 7 Pink | 8 Cyan | 9 Cyan | |
|---|---|---|---|---|---|---|---|---|---|
| Eridium Cost | 4 | 8 | 12 | 16 | 20 | 50 | 100 | 150 | 200 |
| Backpack (12) | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 39 |
| Bank (6) | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
| Assault Rifle (280) | 420 | 560 | 700 | 840 | 980 | 1120 | 1260 | — | — |
| Grenade (3) | 4 | 5 | 6 | 7 | 8 | 9 | 10 | — | — |
| Pistol (200) | 300 | 400 | 500 | 600 | 700 | 800 | 900 | — | — |
| Launcher (12) | 15 | 18 | 21 | 24 | 27 | 30 | 33 | — | — |
| Shotgun (80) | 100 | 120 | 140 | 160 | 180 | 200 | 220 | — | — |
| SMG (360) | 540 | 720 | 900 | 1080 | 1260 | 1440 | 1620 | — | — |
| Sniper (48) | 60 | 72 | 84 | 96 | 108 | 120 | 132 | — | — |
