Exchanging the micro SD card is a very nice feature. Thus it's possible to experiment with different OSes, different projects etc. I really don't want to miss that.
However, I experience the problem that the number of SD cards is increasing and it becomes harder and harder to figure out what the SD card is currently used for.
I am trying to work around this issue by buying cards from different manufacturers, so they optically look different. They also come with a micro SD to SD card adapter, so I write the OS and the project on a small piece of paper and put that paper into the enclosure of the adapter. That still does not solve the issue, because sometimes the paper gets lost and it's till possible to mix up the micro SD cards if you accidentally use two of the same manufacturer at one time (because the micro SD card itself is still not labelled).
This might not sound like a typical Raspberry question, but I only have this problem since I have the Raspberry Pi (actually 3 of them). The number of micro SD cards is at 15 for the moment.
So, how do I best label micro-SD cards?