The Card Case here offers me the best solution. Robust (and not difficult, as has been asserted) and high quality, it comes. The cards can be easily press into the compartments provided and hold bombproof. By indentations for the thumb, they can be just as easily and quickly get out of there.
Pretty soon you develop (at least I) a private system in which used, memory cards from top left to bottom right to be replaced.
That the case is waterproof, at least in terms rain, I can confirm. I had it here on a tent tour. There was a couple of minutes in the rain and in the snow and nothing inside was wet. Nevertheless, I plan so no dives and I will also not undergo testing in a teacup.
For me is very clearly that I only use these protective boxes, for all memory cards. The price I feel completely appropriate.
Strong buy recommendation from me!