Item codex
Bag Expansion I
Adds five slots to the standard 30-slot bag (30 → 35).
upgradeEarly-game relevance
What to do with it
The first Bag upgrade removes five slots of pressure before fishing and Moonlit Forest trips. It is triggered from the Bag screen, not crafted at a Worktable.
At a glance
Get itBag screen → Expand.
Process / recipe5 Fiber + 5 Softwood + 5 Stone
Main usesAdds five slots to the standard 30-slot bag (30 → 35).
Keep or sell?Complete before long fishing or forest routes.
Protect5 Fiber, 5 Softwood and 5 Stone.
ConfirmOpen Bag and compare all three material counters.
NextBuild Storage Box I so reserve stacks stay at Home.
Common mistake
Having one material in a different storage location and assuming the Expand button has counted it.
In-game reference
Last checked against the Early Access build: July 8, 2026
Continue from here
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The links below connect this page to the exact item, resident, place or walkthrough used in the next step.
WalkthroughHow to Expand Your BagOpen Bag → Expand, gather 5 Fiber, 5 Softwood and 5 Stone for the first five-slot upgrade, then build Storage Box I for overflow.Open page →ItemFiberGather Fiber from island plants and keep the first stack for Bag Expansion I and other early crafting requirements.Open page →ItemSoftwoodCut trees for Softwood, then protect the early stack for processors, Storage Box I and Softwood Planks.Open page →ItemStoneGather Stone near Home and keep enough for Bag Expansion I, crafting and the 15-Stone Moonlit Forest bridge repair.Open page →