Cant access any of my worlds or anything

Before you deem this post as a "Duplicate", this is getting on my nerves.

Ive been looking for an answer for WEEKS, but alas NOTHING...

I have done everything to get rid of the stupid "Storage space is full" prompt, but nothing works. I deleted all my worlds, all my skins, and even deleted minecraft entirely... but still i cant access or even start a new world.

Please allow minecraft users to store their data on an hard drive, NOT on minecraft. Minecraft is supposed to be an unlimited base game, so why limit our game???