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DennisMCSE

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Reply with quote  #1 
Have a hard drive that keeps giving an error that it's running out of disk space (an old Windows XP x64 system). Shows about 256MB of free space on a 120GB partition when I do a Properties on the hard drive. But when I look through all the folders on the drive, there's not much data on the drive. So what I did was unhide all the files and folders, including the system files, and did a select all in Windows Explorer and it showed only about 9.8GB of files taking up space on the drive. So not sure what is taking up the over 110GB of disk space on the drive. Even the Program Files folder only takes up about 1.2GB of space, which seems really strange. The Windows folder takes up about 5.21GB of space.



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wobble_wobble

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Reply with quote  #2 
SSD by any chance and cells are dying?
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JaapBrasser

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Reply with quote  #3 
Are you using offline files by any chance, those files are usually hidden and not easily visible. To view if you have offline files try the following steps:

1.

Open My Computer

2.

On the Tools menu, click Folder Options.

3.

On the Offline Files tab, click View Files.

 

Source:https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/csc_view_your_offline_files.mspx?mfr=true

If that is not offline files have a look at TreeSize Professional, it has a 30-day free trial and is excellent for locating this sort of stuff:
https://www.jam-software.com/treesize/
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DennisMCSE

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Reply with quote  #4 
I just tried restoring from a backup and the same issue, just a bit more free space, but still around 80GB or 90GB of space unaccounted for.

These are SATA hard drives not SSD hard drives. So that's not the issue.

I checked the Offline files and the offline files isn't even turned on, so there aren't any files to view. I've used TreeSize Pro before, except that won't help in this case as even if I select all the files on the hard drive, it only comes out to 16GB of files on the C:\ drive. Even if I go folder by folder, it still comes out to about 16GB of files. It's the other 80GB or 90GB of space that doesn't seem to be taken up by files that I can't figure out why that space is being used up.

On the restored backup, only about 4.5GB of free space is available on a 120GB partition, but selecting all the files, on the C:\ drive takes up only about 16GB of space. So there is a bit less than 95GB of disk space unaccounted for that is apparently used up somehow.





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cj_berlin

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Reply with quote  #5 
Dennis,

+1 for TreeSize. Needn't be Professional, though, a Free or even Portable will do just fine. Remember to run it elevated.

Sorry to be stating the obvious, but space unaccounted for is among the things CHKDSK is supposed to detect and fix. Have you tried running it on the volume in question?

FWIW,

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AVMan

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Reply with quote  #6 
I had good luck with https://windirstat.info/ in finding where large folders are.  CHKDSK might be a good place to start though if something strange is going on, especially if you are running a FAT filesystem.
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downtime

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Reply with quote  #7 
+1 for windirstat!

I used it with great success for this very problem.
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Mafervus

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Reply with quote  #8 
I would use whatever your favorite offline partitioning tool may be and check to see if there are any errors in reported size such as partition magic or run a tool similar to spinrite. If the machine was ever used to receive ftp or was internet facing, I would look to see if it got hacked using the fxp exploit. 
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Doug G

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Reply with quote  #9 
If you have java on the computer, jdisk report is a nice tool for tracking down disk space usage.  http://www.jgoodies.com/freeware/jdiskreport/
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