I am working on a Windows 2008R2 box running Exchange 2010. The incremental backups are currently very inconsistent with size. One incremental will be 200MB and 15 minutes later, the incremental is 20GB. I have run comparisons on the .spi files and do not find a significant amount of data that would allocate/justify such a large incremental. This is happening on multiple occasions and my backup device fills up much faster than it should.
Do you have any suggestions?