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Low SSD space prevents Windows 10 update to v2004

HP Recommended
HP Pavilion Power Desktop 580-1xx
Microsoft Windows 10 (64-bit)

I am unable to update Windows 10 to v2004 due to low SSD disk space. The SSD storage is 119GB with 100GB used. I have followed all the HP and Windows instructions to reduce SSD storage  including selecting the HDD with over 700 GB of free space. 

The Windows Settings Storage usage is:

"Apps & Features" is 57.2 GB (but "installed programs & features" states only 3.89 GB which is consistent with the size ordered listing of Apps). What is using the rest?

"System & reserved" is 33.7 GB.

"Temporary Files" is 5.93 GB of which "Updates" is 5.38 GB. 

"Other" is 3.62 GB of which the largest of the 8 listed folders is only 122 MB and the smallest 8 KB. Where is all the rest of the storage used? (The largest used to be c:\swsetup at about 3 GB before I moved all but 92 MB to the hard drive.

"Mail", "Desktop", "Pictures", "Documents", "Music", "Videos" and "OneDrive" in total are less than 300 MB as I store media and documents on the separate internal 1 TB HDD. 

I have managed once to get the update installed but Windows reconfiguartion stuck on 0% for several hours (followed by a hard reboot).

I am sure that many other people must have a similar problem but all my searches just refer to a similar set of trouble shooting instructions that I find do not work.

I am wondering whether the only solution is to replace the SSD with a larger 256 GB SSD.

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Before installing a larger SSD, I would try the suggestions below to see if those free up enough space:

Also, the community Win10 Forums has the following suggestions:

Finally, there is a freeware app known as Wise Disk Cleaner. I use it every day to get rid of junk files:

***If my post helped, click the thumbs-up symbol to say thanks***

***Please mark Accept As Solution if my post solved your problem***

I am a volunteer and I do not work for, nor represent, HP
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