Multiple backups

I just recently learned how to use WD Smartware Pro, and I’m still learning.I have 2 external drives.I use one to put my movies and the other I use the software to make duplicates.It works well, and I’m satisfied.Now I also want to backup my pictures folder in my computer to my dropbox account, but I dont want to mess up the seup I did with my 2 external hardrives.Is it possible to backup my external hardrive and to simultaneously backup my pictures folder in my computer to my dropbox account.

WD SmartWare now allows for two drives to work at once. However, I am yet to test myself if Dropbox backups can work in parallel.