Backing up 2 drives to 1 drive

[QTI]

Originally Posted by dnanian

You should partition the new drive into two volumes, one for each source volume you want to back up. Make sure you click the "Options" button in the Partition tab of Disk Utility and select the proper partition scheme!

Thanks for your super quick response!

So no viable options other than partitioning the drive? Not a big problem now since my drive is new, but the downside is that I need to fix the sizes of the partitions now and I can't foresee whether one partition (photo or video) will be much more quickly filled up than the other (and don't want to spend on partitioning software)...