You can schedule Synctoy to run from the task scheduler. To save typing all the steps, I copied the relevant bit from an articleon the pchell.com website (
full article here).
Open Task Scheduler and Schedule SyncToy to Run Daily
1) Click on Start, All Programs, Accessories, System Tools, Scheduled Tasks to open up Task Scheduler
2) Click on Add Scheduled Task, Click on Next
3) Scroll down and click on the SyncToy option, click on Next
4) Under "Perform this Task" choose Daily and click Next
5) Now choose a start time, I would recommend either a time when you first turn on your computer or late in the evening when you are done for the day. Choose Daily again for when to perform this task and choose the current date then click Next.
6) Here's the tricky part, in order for the task to be scheduled, you'll need to tell the scheduler which user to perform the task for and the username for that profile. Enter the username and password for this profile in this section and click Next.
7) On the next screen check the box for "Open advanced properties for this task when I click Finish" and then click Finish
8) When the Advanced Properties box opens, look under the Task tab for the Run line. It should look similar to the one below.
"C:\Program Files\Microsoft\SyncToy\SyncToy.exe"
Make the Run command look like the following to allow SyncToy to run all the folder pairs.
"C:\Program Files\Microsoft\SyncToy\SyncToy.exe" -R
9) Click Ok and close the Scheduled Tasks window.
Congratulations! You have now setup your computer to backup important information like your email, favorites, address book and My Documents directory to your removable or external backup device on a daily basis using Microsoft SyncToy.
HTH