i usually never post or comment on techie stuff like this. so here it goes.
I superrrr love my phone and when this thing happend ive gone crazy mad because my phone just keeps on hanging and freezing and i keep on pulling out and back the battery of my samsung s3. i spent days on reading forums and blogs and tried to understand but nothing worked. i even tried checking youtube videos but nothing happend.
ok ok too much of my story so il jump into the solution:
1. download "dummy file generator" on google play store
2. open the app
3. go on "internal memory" tab
4. dont worry on what to put on the "byte" box
5. select "generate FULL" generate dummy files until storage is full
6. YES, your phone will hang and freeze a couple of times. (what i did is pull out the batt again)
7. keep on doing this until ur memory is full
8. then select "delete" delete all dummy files.
9. then thats it
i dont know if it will work for other but YESSSSS it worked for me no hang and freeze since then.
hope it helped!