Not sure if this is the right place to make this announcement, but here goes! I'm a video producer and photographer and for the last 3 years I've been shooting all my material on SD cards. Naturally I back everything up, but that is not enough for me, I like to keep all my original material on the cards until all is edited, sold, distributed, posted or whatever. Paranoia simply prohibits me from deleting cards and using them again. So I used to mark all my cards with a paint pen and then enter their contents into a little book. This rapidly became total chaos. So I decided to design an App to do this instead and finally it has been released on App store for Iphone and iPad. It seems to work quite well. I have posted the link to the free version below so please try it out although it will only allow you to save 2 cards, but you'll get the idea. Maybe it will be useful to others like me who are terrified of erasing their memory cards!

https://itunes.apple.com/gb/app/memory-card-organiser-lite/id577759951?mt=8>