HTC One M7, "Other" storage category seems too large It hasn't become a legitimate problem but I'm on my way there because I met a person who showed me how their HTC One ended up with really large Other category size in Settings -> Storage free disk space report.

So, currently my 32GB storage is consumed like this:

8.03GB Apps
5.64GB Music
1.87GB Photos &amp; Videos
7.21GB Other
9.24GB Available

So, that looks insanely large to me. More than Music or close to Apps.

I'd like to be able to review somehow what takes up those 7.21GB. Does anyone have an advice as to how I could see what exactly is those 7.21GB of data? Because it keeps growing over time. I do use the Clean Master app, and it saved tens of gigs of space but still Other keeps growing and I don't want to wake up one day to a phone that is full of data I can't manage.
My own best explanation so far, is the fact that a number of applications may cache some data during the course of actively using them. Data that can't be classified as any of the standard categories, such as Music, Video, Pictures, Applications, etc or Android's accounting methodology fails to recognize this cached data, or doesn't bother to look in places where it's located.

Also, there is another type of applications that use a specific model when the application itself remains small size which, once it is installed, downloads gigabytes of "data files" that are not recognized by Android as part of this Application. For example, a lot of games seem to be doing this but it's not uncommon to see other applications to download any type of data files (dictionaries, etc.)

So, basically the problem and a challenge of identifying what exactly eats up disk space and why Other category is so big is because Android's accounting structures are far from perfect. It just clearly fails to associate "data files" and any cached data with an installed application, which is what normally a user perceives as a logically convenient way to answer the question of "How much disk space does program X take up?". Android simply attributes it to Other category that usually looks disproportionately large on just about any Android system I've seen so far.