How to see what is stored in System memory area? I have a Samsung Galaxy Tab 2 7" tablet (Android 4.1.2, not rooted).  I tried to install a big app recently and it failed because it said that I didn't have enough space.  

When I go into Settings > Storage, this is what I see:
8GB - Total Space
2.83GB - Apps
199MB - Pictures, videos
116KB - Audio
18.69MB - Downloads
3.47GB - Miscellaneous files
1.14GB - Available space  

The 3.47GB for Miscellaneous files seems really odd to me.  When I select the "Miscellaneous files" item, it says that most of the space (3.33GB) is being used for "System Memory" and the rest contains a number of small files.

I have tried restarting it, cleaning out cache of various apps, and a lot of poking around with a file manager.  I have also moved as many apps to SD Card as possible, but most of my apps don't support that function.  

I just can't understand what is taking up almost half the available storage space.  Is this normal operating system stuff that can't be cleaned up?  Is there a way to see what is contained within and clean some of that space up?  If there is one particular app that is taking up a ton of "System Memory" space, then I might be willing to remove it.  Note that I have looked at the applications through Application manager, sorted by size, and the largest app is only using 323MB of app space.
Just get X-plore mate ;D. I have been usign it since 2006. It is available on multiple platforms. 


You can see system folders.
You can see hidden files and folders.
Which you can delete/copy/move (be careful when you do that)
You can open many archived files as well.


https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore