Hi: I own iPad 4 with iOS 10.3.3 installed. Device information tells me that out of 13.05 GB total (it is a 16GB model) only 1.37 GB are free. However, when I add together all space occupied by all programs (and their data), it all adds up only to 1.8GB. So my question is - what occupies 9.67GB of storage space and can any of them be freed up? I ran diagnostics with a third-party software and it says that only 200MB are occupied by temp files.