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I'm running Windows 10 version 1909, OS build 18363.900.

After upgrading my Win 10 version, my HDD has been almost full, degrading performance. I now have about 40MB free on my 436 GB C:\ drive (my main partition).

System \ Storage says that I have 134 GB in "Temporary files", the same as the 134 GB in "Apps & features". (Before the upgrade, I had about 100 - 200 GB free.)

Opening "Temporary files" only shows 1-2 GB of files (which I do not want to delete).

Thus, it looks like "Temporary files" might be mirroring "Apps & features", but in a way that I can't disable/delete.

I've deleted C:\Windows.old. This initially gave me about 10 GB free, but it's filled up again. Disk Cleanup and malware scans don't find anything.

WinDirStat (suggested by @RamHound) shows a 10 GB C:$Recycle.bin with directories like S-1-5-... that I can't delete. It also shows an 132 GB C:\Windows\Temp<Files> directory containing .evtx files like Microsoft-Windows-Store_Operational_... which I can't even find in Windows Explorer, let alone delete. These two directories seem to be the problem.

Colin Rowat
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  • I found WizTree more useful as it allowed me to bulk delete the .evtx and .txt files filling my Temp directory. I also followed the accepted answer at https://superuser.com/questions/1371229/low-disk-space-after-filling-up-c-windows-temp-with-evtx-and-txt-files to stop new .evtx and .txt files. Can you submit an answer mentioning these for me to accept? – Colin Rowat Jul 19 '20 at 11:57
  • I can flag this as a duplicate. I don’t submit answers to duplicate questions – Ramhound Jul 19 '20 at 19:01
  • thanks @Ramhound: I don't want to accept this as a pure duplicate, as I needed to work across two previous questions. If you didn't want to submit an answer referring to these, do you mind if I do? – Colin Rowat Jul 20 '20 at 08:23
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    A question can be closed for being a duplicate of multiple questions – Ramhound Jul 20 '20 at 10:57

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i was getting that problem, to fix it open cmd as Administrator just type: Takeown /f (location of temp files here) after it says "operation success" ,go and delete the temp files

Te9chira TM
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    thanks @Te9hira TM: I don't know how to find the temp files that System/Storage tells me I have as I can't see them when I open "Temporary files". – Colin Rowat Jul 18 '20 at 14:05
  • press windows key + r and then type temp and then delete everything when you done press win key + r again and type %temp% and then delete everything (after you type the command of course) – Te9chira TM Jul 20 '20 at 21:00
  • also did you check show cached folders in folder options? – Te9chira TM Jul 20 '20 at 21:04
  • I think so: in Windows Explorer, I was trying to show everything I could. For whatever reason, WinDirStat and WizTree were more useful. – Colin Rowat Jul 21 '20 at 16:26