I have a backup drive at home and at work that I use for my laptop. I recently upgraded to Windows 7, and I've been experimenting with Windows Backup and Restore. I've noticed that if I don't change any settings between backups, the sizes of subsequent backups are much smaller than the original. This is as expected and good. Most of the time, I want the system to do an incremental backup. However, if I change the destination drive from my work backup drive to my home backup drive (or vice versa), the program doesn't seem smart enough to tell that it should do an incremental rather than fresh backup. This results in very long backup times and large file sizes for what should be quick, routine backups.
My question is: Do I need to use a more sophisticated backup program (e.g., Acronis TrueImage) to perform backups in two locations, or am I just missing a setting on Windows Backup and Restore?