I have a 93 extended cab pickup 2wd. Is there any place under the truck bed where i could place some type of storage device?

I have tons of stuff in my rear seats (tools, repair manual, water, wheel block, toilet paper, paper towels, drinking water.. i've even been considering putting in a few snacks

anyways, i already have a huge speaker box there and I would like to move all this stuff somewhere else becuase i don't use it that often. i did consider getting one of those boxes that go in the truck bed, but i've heard they get broken into a lot and i wouldn't wanna be caught in the middle of nowhere without toilet paper

so any suggestion?