Storage on my Galaxy S5 - what's using up all the space?

A

AC Question

My phone comes with 16gb on board, I have had it for 14 months. I checked it and my apps are only using about 1.0gb, with data downloads, pictures and so on the phone say it's only using about 4gb but the rest of it says other 11.5gb. I cleaned the internet history, catch files, all calls in the log, and so on. I can't find what is burning up all my storage space. Is there some hidden stuff somewhere I have to clear or something. I had this problems like last month and deleted like 4 apps so I gained about 1gb, but the phone filled it up with something.

Thanks