How do Maplers carry their stuff?

Fair enough. But really, it's questions/funhouse-esque topics like this that bring up logical things in MS, when obviously no answer can be provided due to Maplestory possessing its own laws.

I believe we all have access to a dimensional rift where we store all of our things. We can open and close it at will and take from it whatever we need. The floating windows we can open are that space.

So how would one go about breaking into someone else's dimensional rift?