Digital photography is still new to me. I formerly stored my negatives together with a contact sheet in a 3 ring binder. Now, I am collecting all sorts of memory devices and I feel there is a better way. I have some on SD cards, some on memory sticks (usb) and I am thinking of trying CDs. Most are backed up in the PC but that sounds like they could be lost by pressing a wrong key. What is the preferred method of storage these days? I have photoshop elements but haven't figured it out yet.