Windows 10: Free space on a hard drive has got corrupted, HELP

I have 2 8Tb drives that I manually keep in sync. Recently, I have no idea when, the free space on them just got out of step. I've JUST re-synced them but at this moment there is

1,416,419,140k (& 70,438 files) free on one and 1,938,941,052k (and 70,435 files) on the other. The difference of 3 files does NOT account for the almost half a terabyte difference.

I summed all the files and they are 5,808,282,200k on one and 5,778,681,337k on the other. The difference is because I have imaged my system (at different times) to each drive.

The one on the left (R: 1.4Tb free) is the one that appears wrong.

Two questions....

1) Why/How did R: get corrupted?
2) how do I fix the available "free space" on R: the incorrect drive.

Sorry, a thumbnail with the same drive somehow got attached to this question and I can't delete it.... Sorry

:)

 

Do You Have To Close All Running Programs Before Compressing The Entire Drive C: - Operating System ???

Hi William,

Compressing your hard drive may corrupt system files on your computer. We don't recommend using that option to save disk space. The operating system itself consumes 16-20 GB on the hard drive(16 GB for 32-bit OS 20 GB for 64-bit OS) plus other programs installed
on your computer. We recommend upgrading your hard drive to avoid getting disk space issues. You may also follow the steps in this articles to help free up drive space in Windows 10.

Disk cleanup in Windows 10

Free up drive space in Windows 10

Should you need further assistance, feel free to post your query any time.

 

How to delete Windows Store unfinished downloads?

I recently am downloading an app from the Windows Store that takes up about 12GB of size. However, after 0.2GB has passed, I decided to pause it and will resume later. To my surprise, after I resume it, it went back to 0.0GB, so I had no choice but to just
restart the download. Then after a while, I then decided yet again to pause it because I need turn off my internet connection. Then after resuming it, it went back AGAIN to 0.0GB... I got fed up of this nonsense, so I just stopped the download and try again
later... After a while, I checked my hard drive, and I was shocked to see many of my free space GONE. Then I just realized that I recently had several failed attempts of Windows Store downloads, so I tested if Windows Store is related to my disappearing hard
drive free space. I tried to download that 12GB app again and paused and resumed after a while, then I saw my hard drive keeps getting clogged up after that, which proves that Windows Store is the culprit for my disappearing free spaces in my hard drive...

Help! Is there a way to get rid of the unfinished downloads of Windows Store?

My hard drive was supposed to have 230+GB of free space, but now it only has 170+GB of free space...

 

Press the Win Key+X and choose Disk Management. In the Disk Management window, in the lower pane, does the R: drive have a separate partition without a drive letter or Unallocated Space?

 

Are the clusters the same size on both disk as that could make a big difference

 

Both discs were bought at the same time and setup exactly the same. They ran forever identically but just differed recently. I'll try to paste a cropped Disk Management snapshot below?





I generally copy things to S: and once every couple of weeks sync R: to S:

I had considered RAID mirroring the 2 discs but, because my PCIe SATA card was new I didn't have confidence with it's RAID routines.

The discs have worked perfectly for about 19 months. I AM computer literate though not an expert. Have been programming for over 40 years *Smile

As you see there is about 6Tb information so I can't just format the disc and re-copy everything back to it. This is a solution I maybe forced to adopt!? *Sad

Thanks for your replies *Smile