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This may have been going on for a while, but I have only noticed a few weeks ago.

There are some folders inside the Downloads folder (i.e. subfolders and subsubfolders) which originally contained documents meant for a particular period and thus were named after year and month (e.g. 2014-05).

They contained documents which I have read in apps like Moon+ Reader.

I deleted those (sub)subfolders many times now, but they keep coming back.

My first hunch was: "oh, somehow Moon+ Reader must have registered them in its DB and keeps recreating them". So I decided to use the rudimentary file browser included in that app and removed the folders there. Yet, after every reboot they keep reappearing.

How can I track down the culprit? Is Moon+ Reader perhaps known to behave like that?

  • Default folders like Downloads, Music, Movies etc. are recreated every time Android checks for them (periodically or after every reboot) and thus are not meant to be deleted. Even you put an empty SD card in your phone, it would always get filled with empty, default folders, for easy file/document sorting. – GiantTree Feb 12 '15 at 19:06
  • @GiantTree: yeah, but my question isn't at all about those "system folders". It's about subfolders (actually subsubfolders) of them. And those should be mine to manage. – 0xC0000022L Feb 12 '15 at 22:35
  • Well, that's weird. That shouldn't happen except a special app creates them. – GiantTree Feb 12 '15 at 23:09
  • @GiantTree: yep, that's my problem. How to track down that culprit :) – 0xC0000022L Feb 13 '15 at 9:57
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I have now been able to confirm without doubt that indeed Moon+ Reader is responsible for the folders reappearing after deletion.

The problem is that I've come up empty-handed when looking for a database or text file related to Moon+ Reader which contains the names of those folders.

Meanwhile I have moved my books into the Books folder instead of leaving it in a subfolder of Download, but now the whole folder hierarchy inside Download which was used by Moon+ Reader keeps reappearing.

Unfortunately even rating the app requires a Google+ account which I will not create and there is no support contact given. So no way to report this issue back. But I am thinking about extracting the app and trying to find the offending code to add more details here.

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  • "The problem is that I've come up empty-handed when looking for a database or text file related to Moon+ Reader which contains the names of those folders." -- for confirmation only, have you looked into the data directory of this app (under /data/data)? – Firelord Dec 10 '15 at 6:38
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    @Firelord: yes, correct. That's the place I looked at. – 0xC0000022L Dec 14 '15 at 11:49

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