A Large Amount of Data Is Backed Up During an Incremental Backup

Article ID: WFS0012 The size of an incremental block-level backup may be large.


You may notice that a lot of data is backed up during an incremental backup.


The size of the backups may be large due to the following reasons:

  • Defragmentation may have been run on the volume recently.
  • You are backing up applications, such as Exchange Databases

Including applications, such as Exchange Databases, in your backup, creates highly fragmented volumes that result in more data being backed up.

  • The volume is highly fragmented.



Make sure that you identify and resolve the possible causes before you start your next backup job.