All time got this advice. What need to have 180 slots??
The Old Man
Hold CTRL and then left click on the item you want to store in bank. Once you fit all the visible slots, new row of slots will unlock, just keep storing items till all the slots appear.
all visible slots/windows must be filled before a new line of slots appears.
I suggest you use something like original magnetic ore (omo), tiger totems or logs or something that stacks to 100+...
separate them into "stacks" of 1
ctrl+ Left click each omo or totem filling every slot, until you see all lines of storage.
keep lesser or unused items in that lowest/last line of windows, that way you will always see all lines of storage.
Extra Space; Bank Safe Deposit box, Warehouse, Flax, Canvas, Leather Bags info