Can I Use Two External USB Hard Drives?

Hi,
I'm running Windows 7 64 bit on my laptop. I have external USB hard drive A with a file system of folders of my pictures, and I intend to make a copy of drive A to another external USB hard drive B. After drive A has been copied to drive B can SyncBackFree perform incremental backups from drive A to drive B? Do I need SyncBackSE or Pro instead?

I have read that you do not use a proprietary file format. In the event of a failure of drive A I intend to connect drive B to my laptop and use it as the file system for my pictures. Can I do this without performing any restore/recovery tasks? I realize that I may lose some updates and new files added to drive A since the last incremental backup to drive B.

Thanks,
Gary