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Large incremental backups

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Posts: 13
Comments: 36

Many of my incremental backups are almost as large as the full backups when I have not added any new data to speak of.  In the attached example, the last incremental is 25% of the full backup, while some are much smaller.

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Robert, what version of Windows OS are you using on this computer?

There are many reasons why incremental backups may be much larger than expected.

  • Windows Updates where new build versions are installed, i.e. Win 10 1909
  • Use of disk defragmentation utilities
  • Installation of new applications
  • Use of disk encryption tools

Your screen image growth in the size of your 3 recent full backup images, i.e. from 378GB to 388GB then to 447GB before the 112GB latest incremental file, which suggests that there are some significant changes taking place.