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Less Space Used After Restoring from A Backup

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Hello everyone,

I recently went through a data loss and restored from an earlier backup.

When I firstly made the backup, I noticed that the backup file is much smaller than the actual files on my disk (100GB vs 200GB). I thought it was the compression that ATI did to my files, so I did not bother to think twice.

However, when I recently restored from the backup, the drive shows that only 105GB is used, whereas it was supposed to be 200GB of files.

My question is, did ATI restore my files with them still being compressed? It is taking 1/2 of space than it is before I did the restore, I don't want to but I do suspect that some of my files to be missing given the obvious and tremendous reduction in the disk space used. I navigated through the data and did not notice any missing stuff at the moment, but I just want to make sure with everyone and see if they had the same situation.

Thank you for your help!

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Most likely it didn't restore Windows Restore Points, as it doesn't backup them. Check how much space they are set to use, (in system restore in windows control panel) and does it correlate with 100 GB loss.

dev-anon wrote:

Most likely it didn't restore Windows Restore Points, as it doesn't backup them. Check how much space they are set to use, (in system restore in windows control panel) and does it correlate with 100 GB loss.

I didn't use Windows Restore. I chose the whole disk back up in the ATI, and saved archive files to an external hard drive. For the restore, I connected external harddrive and went into ATI to restore the backup archive to a new internal hard drive.

The point is that as you use your computer daily, if you have Windows system protection turned on (which it is by default), Windows does shadow copies of the files and registry files on your Windows partition.
To check whether you have Windows system protection turned on, right click on the computer icon on your desktop, choose properties, choose system protection in the upper left.

I just checked. It is turned on only for the OS drive (drive C) but not for the data drive (D:\), to which I performed back up and restore.

BTW, the backup did restore the data drive to the last time I backed it up, i.e. July 19th. The newest files are dated to this date.