Windows 10: Discrepancy of used space and actual shown space in the system.

I have two SSDs on my desktop pc. I have the smallest one dedicated to OS and related apps. Checking the actual files and apps installed in this disk, data shouldn't be taking more than 70gb and even worse when checking directly on storage setting, as it barely breaks 50gb. However, the disk is showing 128gb of used space. Why is there such a huge discrepancy between values? Why is storage locked on 128gb of used space on my 512gb disk?

:)

 

Discrepancy between 'Used Space' on C drive and total of actual folders/files

According to 'Properties' in Windows Explorer, my C drive (one of four partitions on my primary drive) has 296GB 'Used Space' and 272GB 'Free Space', giving a total partition size of 568GB. However, if I add up the total space occupied by all the folders
and files on C drive that are listed in Windows Explorer they come to roughly 44GB. (The largest folder is Windows (19.5GB), followed by Users (9GB) and Program Files (5.8GB). The rest of the folders are smaller than this.). Nearly all my applications, data,
photos, videos, backups etc are on the other three partitions on the primary hard drive or on a secondary internal hard drive.

Can anyone suggest what accounts for the HUGE discrepancy between the reported 'Used Space' and the total of the actual folders/files? I first noticed this when backing up my C drive using Acronis TrueImage, which yields a back up file of 218GB - presumably
the 296GB with some compression. A few months back I recall that the Acronis backup files were sized at around 60-70GB, so there's something funny going on! If there is some giant folder or file that is lurking on my C drive, what could it be and why isn't
it showing up in Windows Explorer?

 

C Drive Used Space Different

Hello,

Based on your description of the issue, there are some factors why you are seeing discrepancy between the disk size shown on your drive and the size shown on the tool you have used. You can find helpful answers found on the threads below:

• Why is there a discrepancy with disk space usage?
• Windows 10 Size on Disk Vs File Size Discrepancy

If you have further questions, feel free to post on this thread.

 

Storage Spaces Actual Available Space (Windows10)?

I don't actually understand you question:

1) You know the total capacity as you know individual disk capacity

2) You know the actual available space as it it shown by WIndows (as you wrote)

Which information is missing that should be queried? You want to know the available space before creating storage spaces directly from WIndows?

Thanks

Ugo