I have many raspberry pi projects, and they use version 3B, 3B+, 4, 5 hardware, and when I'm developing, I may have several versions of firmware loaded on SD cards. I sometimes loose track of what version of software is on a card. How do you organize your SD cards and tell what development software is installed on each one without having to load it up and look for markers in the files? If I have a label maker available, I add tags on top.