If you’re playing Borderlands 4, SDU (Storage Deck Upgrade) tokens are essential. They let you increase your storage space, backpack, ammo capacity, bank slots, and more. Without enough SDU, you’ll feel limited in what you can carry or how effectively you fight. Here’s a clear, step-by-step guide on how to get SDU in Borderlands 4 and how to use them well.
SDU tokens are a special upgrade currency in Borderlands 4. They are not just for one item or weapon—they help expand different storage capacities and improve your ability to carry more gear. Some examples include:
- Backpack slots
- Bank slots
- Lost Loot storage
- Ammo capacity for various weapon types
Upgrades cost more tokens the higher you go, so managing them wisely matters.
Ways to Earn SDU Tokens
There are several methods to obtain SDU in the game. Some are faster than others, some require exploration, and some involve combat. Here are the main ones:
- Capturing Safehouses and Order Silos
Unlocking these locations gives you SDU tokens. Safehouses are often fast-travel or rest points, while silos are strategic locations you clear out. - Solving Evocarium Puzzles
These are puzzle-type challenges. You collect orbs (often yellow) or complete tasks in certain areas, then interact with an object or statue when done. Rewards include SDU tokens. - Finding Vault Symbols
When you discover or interact with Vault Symbols scattered across the world, you earn small amounts of SDU. Though they aren’t huge rewards individually, together they add up. - Exploring Kairos
Exploring the game world—maps, hidden areas, and side-quests—often leads to rewards. Some collectibles, hidden chests, and optional objectives yield SDU tokens. - Defeating Bosses or Completing Major Enemy Encounters
Boss fights, Order Bunkers, Abandoned Auger Mines, and other tough zones often drop SDU tokens as rewards.
Where to Spend SDU Tokens
Once you have SDU tokens, you spend them in the SDU Menu or Upgrade Menu. Here are the typical places you’ll invest them:
- Backpack slots (to carry more weapons/items)
- Bank slots (storage shared across characters)
- Lost Loot Machine slots (helps you auto-collect what you missed)
- Ammo capacity (for pistols, shotguns, rifles, etc.)
Each upgrade costs more as you go up, so early tokens are less powerful than later ones.
Best Strategy: How to Use SDU Wisely
You could spend tokens evenly, but that might not help you enough early on. Here are tips on which upgrades to prioritize and when:
- Upgrade your backpack first.
This usually gives the biggest benefit early on—allowing you to carry more loot, weapons, and gear, while reducing how often you need to return to storage. - Lost Loot Machine next.
Missing legendary drops or rare items can be frustrating. If you improve this, you’re less likely to lose valuable loot just because you couldn’t carry it. - Bank upgrades come later.
These are more long-term investments. If you’re playing more than one vault hunter or switching characters, they’ll become more useful. - Ammo capacity upgrades are situational.
If you’re using certain types of weapons a lot and find yourself always low on ammo, then improving ammo capacity becomes important. But it usually gives less general benefit than storage upgrades.
Tips & Reminders
- Don’t try to upgrade everything at once. Focus where you feel limited first.
- Higher tiers cost many more tokens; sometimes it’s better to save tokens for a bigger upgrade than spend them on small improvements.
- Always keep an eye out for safehouses, silos, collectibles, or puzzles while exploring—you might grab SDU tokens just by playing naturally.
- If you enjoy combat and boss fights, combining fighting with exploration gives you double rewards: loot plus SDU.
- Check the map regularly for symbols, quests, or icons that suggest a puzzle or optional challenge. These often hide good SDU rewards.
Common Questions
Are SDU upgrades account-wide or per character?
Upgrades like storage or lost loot usually benefit your account, but some tasks such as collectibles may need to be done per vault hunter.
Can you buy SDU tokens or use in-game currency?
Generally, SDU tokens are earned through gameplay. You don’t simply buy them with money or standard currency; instead you unlock them from challenges, exploration, and completing game content.
