50GB 'missing' from hard drive

A Win XPpro PC has a 72GB partitioned as drive C: (there is also a system restore partition of a few GB with no drive letter assigned).

My problem is that only about 23GB of the 72GB appears to be usable.  Windows Explorer indicates a C: disk size of 72GB with 1.9GB free.  However when you when you add up space taken by all directories and files it comes to just over 20GB.

Chkdsk confirms this as it reports a total disk space of about 72GB with 69GB used in about 82,000 files whereas indexed file space is 20GB in about 8,000 files. I have ran chkdsk  /f but it completes without fixing the problem.

Urgent help in fixing this would be appreciated.
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Gary CaseRetiredCommented:
Is this by chance a Thinkpad?   If so, the issue is simple (it's a utility called R&R Backups).

In any event, be sure you change the "View" options in Windows Explorer to see hidden files and folders and to NOT hide system files ==> then re-run the TreeSize utility and it should show the "culprits" that are using the additional space.

... but the most common issue like this is on Thinkpad's due to the recovery information that R&R Backups stores on the partition.   You can easily recover the space by simply disabling R&R Backups.

Assuming your system is a Thinkpad, here's what I've written about this issue in previous posts:

... it's the IBM Rescue and Recovery program.   This program has the dubious distinction of being about the only program I know of that makes a complete system state image backup ==> and then stores it in the same partititon.   (This is, by the way, NOT a good idea)   While this will let you recover from system corruptions, it is useless if the drive fails.

If you change Windows Explorer's settings to show all hidden and system files you will find a directory called RRbackups => this contains the backups from the Rescue and Recovery program (you'll likely see that the folder is very large).

I think a good system image is an important backup => but it's best to store this image on another drive (or at least on a partition other than the one you're imaging).   While you may want to simply let Rescue and Recovery continue to make its backups ... IF you have an external drive and do your own backups (a better idea anyway, since they'll be on another drive) you could turn off the Rescue and Recovery automatic backups => and then it won't "eat" your drive's space up anymore :-)
nappy_dThere are a 1000 ways to skin the technology cat.Commented:
Run this app on your computer, it is free http://www.download.com/1770-20_4-0.html?query=TreeSize+Free&searchtype=downloads

It will help you determine where your disk space is and from there you can post back to us the results for further guidance.
bluntTonyHead of ICTCommented:
Open Disk Management. (Start > Run > diskmgmt.msc).

You should see the physical disk that C: is sitting on. Is there unallocated space directly after it? If so, you can extend it using diskpart. Have a look at this:


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bluntTonyHead of ICTCommented:
Sorry. Misread your question. What I suggested probably won't yield any results for you.
Download and execute this tiny, free utility:

DriveUse reports detailed disk space usage on all drives and presents the results in a clear, sorted, tree-like structure.

Once you have that, you can verify just how much you should have.
ianmal2Author Commented:
Disk management (Start > Run > diskmgmt.msc) indicates;

Disk 0: (2 partitions)
Volume: (C:), NTFS partition, Healthy System, Capacity 70GB, Free 1.84GB
Volume: SERVICEV001, FAT32, Healthy, Capacity 4.53GB, Free 607MB

File Tree managers gives the total file space occupied as 24637MB, ie about 24GB (using DriveUse)
An alternative Disk Space manager called TreeSizeProfessional gives the same used space with a free space of 2GB

So where is the 'missing' space?
nappy_dThere are a 1000 ways to skin the technology cat.Commented:
OK but these utilities should also be showing you the largest directories and files.  Can you post a screenshot of the results?
ianmal2Author Commented:
Thanks garycase.  I think you are spot on. It is an IBM Thinkpad and there is a directory called RRbackups.  I noticed this directory however I could not determine the size as it indicates 'access denied' and there is no security tab (I am logged on as local administrator).

Unfortunately the laptop is at work and I am currently at home.   If I disable the R & R prgram will I automatically recover the space?  Or do I have to do anything else?
Gary CaseRetiredCommented:
I don't have a Thinkpad to look at; but I believe if you run the R&R Backup program and disable the automated backups, it will give you the option of deleting all the old backups.   Just do that and your space will "magically" reappear :-)

You should be able to "see" the backups if you set Explorer's options to see system & hidden files.

... in any event, there's no doubt that's what using your space --> problem solved :-)
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