in the game it has the option to expand your Warehouse (bank)or bag space in ArcheAge,
Talk to a Warehouse Manager then click on the "plus" icon under the Warehouse,or click open your bag to click that plus
it will open the expand warehouse menu, or expand bag slots menu .
there it shows "Expand Warehouse by 10 slots?" ,"expand bag by 10slots?"
that requires an Expansion Scroll which you can buy from official cash shop for 300 credits.
just click the marketplace on the right bottom corner side of your game client .
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