'Storage space is running low' while I have plenty of space remaining I have an LG-D855 smartphone having  16 gigs of internal storage and running Android Kitkat 4.4. Although I have plenty of space remaining, the phone prompts Storage space is running low.. I had only installed an obb file of 1.2 gigs, which was of Fifa 14; and a few apps which sum up to around 3 gigs out of the total 16 gigs, yet the phone prompts so.

I deleted the obb files and it freed up around 8.5 GB of memory. Likewise, I guess 3 GB worth of apps filled up whole 16 GB. I have tried factory reset over and over, but in vain. Please help me.
This is really a common question from android users.

The answer is that Android has two type of space: app space and file space. When you install an app, it will use the App space (that is usually around a couple of gbs). When you do a factory reset, you will remove all installed apps (from app space) but file space will not be touched.

A common solution to this problem, is going to Settings -> Apps and try to move as much app as possible to the external sd storage.

Good luck