I have two very small plastic boxes one for camera and the other for the keyboard (just right size for SD Cards complete with their case) and like Bill, I use a permanent felt tip pen and number each on their own label and also put a small plain self stick label with the same number on the case that houses the SD Card.

I use the KN SD Explorer Tool to print an Index of what is on each of my cards which is kept in a 4-ring folder along with other information.
My music is marked with the relevant info e.g. 'SDGB1-01 Miller',
'SDGB-02 Xmas' etc.

If I am searching for a particular tune, I go to the Index first to find out which SD Card is storing it, put it in the keyboard, load by number and more often than not, the style is loaded and ready to play before I am "sitting comfortably"

I also have a small case that holds 8 SD Cards which I take with me on 'gigs'

I enjoy hearing how other members work and have picked up quite a few hints and tips over the years. That's the beauty of this site.

Strange this subject should come up for it was only yesterday I saw new Sandisk SD Cards in a local computer store which had a blank space on the label specifically designed for adding your own information and I remember thinking to myself "about time too" - coincidence or what?

Audrey