Find the Expand control, hover missing materials, build the processing chain for later tiers, and upgrade before long forest routes.
Use the phone tutorial when the bag screen is unfamiliar. It highlights the bag expansion page and explains the basic interaction.
This is faster than clicking every character or shop looking for a bag vendor; the upgrade is handled from your own inventory interface.
There is no need to search town for a dedicated bag vendor.
Open the bag and press Expand. Hover each missing material icon to reveal its name and count.
Write down the complete list before closing the menu. Later upgrades use processed components, so guessing by icon is unreliable.
Do not buy random materials based on color or shape; read the item name.
Set up the furnace, worktable, and relevant material processors near home. Feed them in parallel rather than crafting one component at a time.
Keep the upgrade panel’s quantities in mind and collect every finished output before returning to the bag menu.
Raw materials may be abundant while the processed version is still the true bottleneck.
Move upgrade materials into a dedicated chest or keep them grouped in the bag. This prevents accidental sale when you visit the General Store.
A small “next upgrade” reserve is more useful than turning every processed part into quick coins.
Selling one missing processed component can add another full machine cycle to the upgrade.
Press Expand again and verify all material counts are satisfied. Confirm the upgrade, then close and reopen the bag to check the new slot count.
Perform this before Moonlit Forest, long fishing sessions, or multi-request runs so the extra space immediately saves a return trip.
Do not start a long route with the upgrade materials still occupying most of the old bag.
Treat the added slots as route capacity, not an invitation to carry every stack. For the forest, reserve dedicated spaces for ammo, food, tools, and new materials.
For fishing or requests, keep one or two rows open so rare catches and rewards cannot be blocked.
A larger bag can still fill instantly if every common resource remains in it.
You should now have the unlock, materials, or route this guide is built around. Keep the next guide open only when you are ready to continue; there is no reason to rush every profession in the same day.
See where this fits on the route board →The control flow and processed-material warning are taken from the annotated bag tutorial, bag screen, and processing-yard screenshots. Current slot costs should always be read from the live upgrade panel.
