I have two sheds like that...
Originally, they were to store my houseold goods in. All the kitchen stuff etc that came home from Uni with me.
Then...anything that was left in the living room got added, then my material stash...and so on.
I now have 2 sheds that are knee deep, and a loft full.
Its really not my fault! Things keep being moved!!
So...the sheds are now a contemplative thing. I go over to them, i open the door, rustle about, find a book and then sit reading it with complete disregard on everything else in there! Or, even worse, i'll find a bit of material from the stash and start wandering around thinking about what i can make from it...then start work on it!
Sheds are wonderful things...