Inexplicably, my hard drive (C) jumped from 409gb to 623 gb

Acer / 7551-7422
December 15, 2014 at 10:33:59
Specs: Windows 7, AMD/Quad / 8GB
I use Acronis to run periodic Incremental Backups to an external drive. The C drive has had about 409 gb on it in total. Then when I went to run an incremental yesterday, I noticed that it was estimating around 4 hrs to run an incremental that normally takes around 20 minutes. When I did a properties check on the C drive, I saw the enormous increase in disk usage. I tried a little investigating to see if there were any new files that had downloaded to the drive. No luck. I checked files by size and date modified. Nothing that stuck out.

There's no way I purposely downloaded 214 GB of new data. I have tried System Restore, but of course, that fails on final approach. In an attempt to try and troubleshoot, I foolishly deleted the last good back up from the external drive. I need a few troubleshooting ideas in order to find the source. I emptied the Recycle Bin, but that didn't help.

Any help would be appreciated.


See More: Inexplicably, my hard drive (C) jumped from 409gb to 623 gb

Report •

December 15, 2014 at 11:36:11
Try all of these first:

You didn't happen to accidentally save one of your backups to C: instead of your normal drive did you?

Have you run any AV software? Though it's unlikely, it could be hacker playing a prank. A file known as a zip bomb, downloaded is very small (a few kilobytes) but when uncompressed can take up anywhere from a few gigabytes to petabytes of useless information:

Click here for full system specs.

Report •

December 15, 2014 at 14:41:50
Just in case run this (green button top right):
Get the updates and before running it go to "Settings> Detection and Protection" and check "search for rootkits". Uncheck trial version during install.

If it finds anything please copy/paste the log on here.

Always pop back and let us know the outcome - thanks

Report •

December 15, 2014 at 16:07:18
Thanks for the suggestions. Malewarebytes is running clean from start to finish. My main user account shows 173 gb when I check properties. My Windows folder is 24 gb.. That equates to 200 gb, give or take. I have no idea where the additional 424 gb could be coming from. I tried to run a defrag analysis and it stops working at 22%. I'm going to try a chkdsk. I'm losing hope :(

Report •

Related Solutions

December 15, 2014 at 16:20:12
Yep, run chkdsk /f (I expect you know why).

Also run Disk Clean up and include unwanted update stuff.

Your count might not be including hidden system files.

Always pop back and let us know the outcome - thanks

Report •

December 15, 2014 at 16:23:24
Make sure System Restore is set on MIn & only have it enabled on the operating system drive/partition.

Do you have Java?

Make sure your browser Temp file settings are set low, 50mb is fine.

If your comp is not an laptop, turn off Hibernation.

Report •

Ask Question