Main Storage Space Slowly Disappearing After App Updates

[Rafterman00]

I noticed that every time I do Play Store app updates to update applications, a tiny bit of main phone storage space disappears. And its not just from apps getting bigger if they update. Many app updates saved a few bytes, yet the storage available drops - usually about 10MB per app per time - about 500MB over the last month, despite no new app installs or other data added. I checked for temp files, apk downloads, logs, caches, the usual space hogs, but I cannot find out what is eating up the data. Any thoughts?

 

[chanchan05]

Run SD Maid.

 

[Rafterman00]

Thanks, tried that (Pro version), but nothing significant was found.