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Windows 7/2008 command line Backup Size - does it shrink?

Last Modified: 2012-05-09

I perform a backup of Windows 7 and Windows 2008 using the below command, daily.

wbadmin start backup -allcritical -include:C: -backuptarget\\fileserver\mybackup -user:myuser -password:mypassword

One day I transfered a lot of data to the computer, then the backup occured. The backup stays large even after i removed the temporary data and performed subsequent backups.

Is there a natural checkpoint for the backup to shrink? or is there a command to make it shrink?

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