Help S5 Memory displaying higher than actual

[Xuheb]

Hi,
Im using Galaxy S5, my phone's external memory card is 16GB and its showing only 2.5GB free. Ive tried searching the data but all the files and folders in the memory totals upto 4GB only. I couldn't understand what is occupying all this space.
The device memory graph bar displays the major data as "others" attached is the screenshot

Can anyone help me out here? Like what should I look for? or is phone hacked or something?

Thanks

Xuheb

 

[Fox Mulder]

First of all what you're showing is internal memory only, it looks like you either don't have an external SD card installed or if you do the phone isn't recognizing it. If it was present the file manager would show both "Device Storage" and "SD Card".
You can try going into your application manager under Settings and clearing the cache for all apps (Cache, not Data). The cache files can get pretty large over time.