I was helping a friend with her PC that kept getting a low storage message. She had done what she could, deleted documents, pictures, etc. When I booted it up and looked at the C: drive, there was 58MB free on a 28GB drive, and most of the files were compressed; if uncompressed, the disk would be overflowing. I did disk cleanup first , which cleans up the usual suspects (recycle bin–already empty, certain temp files, dumps), but that got back next to nothing. I looked at the CBStemp and persist logs under the Windows directory and got a bit more, also DMP files from Microsoft Edge (which kept dumping due to low storage errors, making the problem worse). I cleaned out stuff from the download folder after reviewing it with her.
I looked under her user directory, and it was showing over 7GB used–but again, no documents, no pictures, no video, no music, etc.
So what was taking up all the space? For one thing, there was a ton of junk in appdata, especially temp files that the Disk Cleanup app does not touch (TCDxxxx.tmp, etc), but which can be safely cleared, but there was a lot of other stuff that I did not have time to evaluate yet. I decided to proceed cautiously, and got a couple hundred MB back for now, and we will revisit it next week, looking for more.
I did not do much more because the system was constantly on the verge of locking up due to lack of space (it needs free space to manage windows, even stuff like File Explorer itself, and space for open apps), so I figured start small, and once we get a little more free space, we can tackle bigger things as the system starts acting better. Also, I did not want to try anything drastic, as I will be away all weekend and unable to diagnose if any problems comes up. Even having even the little bit of extra free space that I could get her was a benefit for now.
Also, because there is so little free space, Microsoft Update cannot update. Consequently, it is still on the original July 2015 version of Windows 10, version 1507 build 10240. To update to the latest, 20H2, I have read that you need at least 8GB free, unless you use external media, and even with external Media you need a fair amount of free space. Being on such an old version, I do not know if you can just jump forward to the latest.ย The CBS logs and a lot of the dumps, error reporting files, etc., were all filled with update-failed-due-to-low-storage errors, which, again, by being logged, dumped, etc., just made the problem worse.
The fact that someone could sell her a machine that literally could not update verges on criminal.
For what it’s worth, it is a Dell Inspiron that she bought at Best Buy years ago.
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