When you leave your base to explore the map, where or how do you store your items if your inventory gets too full?
Things are stacked, iron, gold, redstone etc melt down and process into blocks. And have an ender chest with you. But you can't do more than that. You just have to part with some things
It all depends on which one you play in. But what is eigntl. It's always possible to have an enderchest with you. You can store things in that and when you dismantle them, the things stay inside
I craft a chest and put all unnecessary things in there.
If we're lazy, we simply teleport to our warehouse and back again.
If it is an area that has already been developed (directly or indirectly), then we take the train.
If it is really a completely foreign, unexplored area that we want to explore, we're prepared for it and have boxes, workbench and the like with us.
Sometimes we bring the stuff to our warehouse later in stages… Or, if it's worth it, connect the area to our rail network.