Boxes Bags and Belt pouches

Can I ever get a larger storage box? Also, can I ever get something that holds more than 5 for my secondary carrying devices, such as a big bag?

Yes later you can buy an item for 500g that will increase sack size from 5 to 10. There might be one for 10-15 too, I don't know.

You can't increase vault size.

Zai, which is the first place to get that? Is it far from "Bloodstone Fen"? That's how far I am now. I need to make my bags bigger soon, ack. :/

i swear i saw it in yaks bend or the next mission area AFTER yaks bend.

I already have one belt pouch from a collector, and then in post searing received another from a collector. However, this second one in post searing I can't attach at all. It just sits in my regular inventory, and I can't salvage it back to hides or anything. Does anyone know why this is?

Ooo, I see it now! I just want to Yak's and it was there. It's called "Rune of Holding" I guess I just didn't pay attention to it before. Thanks!

You can only have one belt pouch. If you look at the 4 slots for your storage bags, you'll see a backpack slot, a belt pouch slot, and 2 slots of bags. Once you've filled up the respective ones, you can't add more.