A wedding happens once. You don't get a redo, so make sure that backing up your photos on location is a part of your workflow. If you fill a memory card, and pop in a new one, the next thing you should be doing is backing up that full card to a hard drive. I recommend either the Epson P-2000 or P-4000 (shown above), both of which enable you to pop a CompactFlash card directly into the unit and back up your photos onto it without having a computer nearby. I keep a P-2000 in my camera bag, and as soon as I fill a card, I pop it into the P-2000 and hit the copy button. In just a few minutes, my memory card (with those irreplaceable photos) is backed up. Also, as soon as I return to my studio, I immediately copy all the photos onto a removable hard drive, so now I have two backups of the wedding photos. This backing up is so importantwithout a backup, you're placing a lot of faith in those memory cards. Imagine how you'd feel having to tell a bride and groom that your memory card somehow became corrupted and you lost the shots of their ceremony. You can sidestep that crisis by making one or two simple backups.