Windows 10: DRIVES SHOWING FALSE AVAILABLE SPACE

THE READINGS CHECKED DIRECTLY AND MANULLY SELECTING EVERYTHING IN THAT DRIVE DIFFERS , THE DIFFERENCE CAN BE SEEN IN THE SCREENSHOT I HAVE UPLOADED IT SHOWS IT HAS BEEN UPLOADED, THERE IS DIFFERENCE OF SOME GBS SO WHAT TO DO AND I UNINSTALLED A GAME FROM DRIVE D , I SAW 100GB SPACE LEFT BUT AFTER SEEING 2ND TIME SPACE WENT TO 86 , LEFT IS FOR DRIVE D , RIGHT FOR DRIVE C , MAJORLY DRIVE D HAVE VAST DIFFERENCE THAN C

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Help! Data partition not showing under my computer

This is happening on a windows 2000 server. Our second partition of the system, for data is not showing under my computer. Here are the properties of it in disk management:





Now under logical drives its listed as F and shows free space available.

Suggestions on how to fix this?

 

False Boot Drive?


I have two disks listed as boot devices when my computer boots up, however I want to skip selecting the disk and boot directly to my SSD (Disk 1) instead. The other drive listed(Disk 3) just goes to a blank screen when selected.

In This PC the icon for Disk 3 is faded. There is no blue bar indicating drive space. It is listed as USB Drive (G

In Disk Management, Disk 3 is listed as Removable with No media. There is no space available on the disk either.

From"CMD -> diskpart -> list disk" I get:
Disk 0 Online 298GB
Disk 1 Online 223GB
Disk 2 Online 465GB
Disk 3 No Media 0B

When disk 3 is selected and issued the command "Clean" I get the error "There is no media on the device"

What can I do to remove this false disk? There is nothing plugged into any USB ports that could be the problem. The problem has also persisted after multiple boots. It appears Windows is seeing a bootable flash drive that isn't real.

 

File explorer showing false free space in drive

I have 299gb of disk space available on D drive and the files present on it have size of 187gb including system files but the free space shows just 39.4gb.

While opening the properties of drive D, it shows 260 gb used but when I look inside the drive, there is no way it could be 260gb.

Need help.

Firstly, I had windows 11 which had some problems and I switched to windows 10 after which the above problem started. Specifically, I saw the problem after I tried deleting the old windows files left in my D drive for the windows 11 like (Perflogs, Windows, Program files), etc by keeping all of these folders in a folder named (Windows.old) so that the cleanup would delete these files and it did clean it, but the storage remained the same and now I have this free space issue.