Default [Q] System Folder free space

Hi

I'm not sure if this is a problem or not, but I noticed that my system folder is taking up 2653 Mb, but when I go into the system folder I see that it has 2103mb of free space, is there anyway to regain that free space?

I'm running [KOT49H【4.4.2】01-23-2014 at the moment.

Thanks
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