Download ApeJet Backup 2
This beta of ApeJet Backup 2 lets you select a list of folders for backup, and a destination directory to copy those folders to. The software checks the dates and sizes of files for changes and only copies any files that have been updated. This is my poor man's version of RAID (see why).
Eventually, I plan on putting together a nice install package with documentation and source code. For now, I can suggest that you use this with the Windows Scheduled Tasks utility to call a batch file and pass the name of your backup file as a command line argument. If you want to have your computer automatically shut down after running the backup, try something like: