Don't listen to them. You can buy up to 5 backpacks with bigger inventory slots. Just go right clicking on merchants to you find some one that sells backpacks. --- Live GamerTag: XxCubanzyncXx ||| Some people just tick me off. So I find the nearest 2x4 and give it a good swing to their face. (:
You can buy additional bags but you can't replace the backpack. There's a general consensus that having a 16 slot back pack when you can carry 22 or 24 slot bags is a bit dumb and needs fixing e.g. a back pack that scales with level.
--- Your first mistake was posting on a board where people are so hateful. -touch me k-