Query Re Lenova Yoga Tablet 2 1050F Android Tablet

[MOLITTLE]

I bought a Lenova Yoga Tablet 2-1050F - Android version 4.4.2 16GB.
I also loaded a SD card and put some APPS on there, I have no photos videos etc on it as I am still on a real learning curve from my old XP Computer.

When I select Settings and then Storage it shows:
Total space 16.00GB
Available 4.90GB
OS Occupied space 4.89GB
Apps (App data & media content) 1.84GB
Pics 68.83MB
Audio(music ringtones podcasts) 21.00KB
Cached data 1.35MB
MISC 4.30GB

Does anyone know what the catagory MISC is as it seems to contain so much of available space. When you press it nothing happens. I don't really know how to find out what it is and delete it. I can't find any mention of it in the tiny info I have or the internet.
I wanted space to download some programs so that I can watch them offline when I go away. Any help would be appreciated.

[MOLITTLE]

After asking this question I turned the tablet on and found a system update to Android 5 was available, so I installed it and the Misc reduced to 1.11GB so I have a little more space to play with. Just thought I would give you the update.