total C drive space shrinks

Question

I have 475GB of C drive space. Now, it is down to 464GB. How can I get it to go back to 475GB of space?

Answer 1

If the computer was recently upgraded from Windows 10 to Windows 11 the process creates a Windows.old.
This allows the end user to return to Windows 10.
After ten days the Windows.old is scheduled to be deleted.
The deletion can be performed manually as needed to create more drive free space.

There are multiple other files that can be deleted.

There are third party software that can be used to see the files and their sizes.

https://www.jam-software.com/treesize_free
https://windirstat.net/
https://www.diskanalyzer.com/

See this link for additional files that can be deleted:
https://www.tenforums.com/tutorials/83441-free-up-drive-space-windows-10-a.html

https://support.microsoft.com/en-us/windows/free-up-drive-space-in-windows-85529ccb-c365-490d-b548-831022bc9b32
https://support.microsoft.com/en-us/windows/tips-to-free-up-drive-space-on-your-pc-4d97fc4a-0175-8d49-ac2f-bcf27de46d34

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Answer 2

I am talking about the total space, not how many space left. It should be around 475GB. I have 512GB of SSD. The C drive total space is 475GB. I want to regain the lost space.

Answer 3

See: (1000 vs 1024)

https://www.howtogeek.com/123268/windows-hard-drive-wrong-capacity/
https://tierradatarecovery.co.uk/why-does-my-1tb-hard-drive-offer-only-931gb-of-space
https://www.makeuseof.com/tag/1-tb-931-gb-hard-drive/

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.
.
.
.
Please remember to vote and to mark the replies as answers if they help.

On the bottom of each post there is:

Propose as answer = answered the question

On the left side of each post: Vote = a helpful post
.
.
.
.
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Answer 4

Go to Disk Management. There are many ways to do that and many articles describing it and one of them is How to Open Disk Management in Windows 11 - All Things. What partitions are on the drive and how large is each of them?

Answer 5

I will send a screenshot later here.