This might be a quite unusual post and i am not sure if this is the right place for this, but i would like to share how we manage a lot of SD-cards in our team.
Disclaimer: I know balena solves a lot of the issues why someone would need such a system. But with persistent volume claims there is still a small need for keeping track of individual SD-cards.
With in my team i often saw SD cards in the office, that did not seem to have an owner, but i still was to afraid to format them. Therefore i left them where there are and we soon run into SD-card shortages.
Therefore, we looked into ways to mange SD cards and we found simple coin collectors album to do the job.
We have to of them: one with SD-cards that are not used anymore and can be formated and another where everyone needs to store their sd-cards with a little note on the side. Therefore every SD-card that is not in a device or in this book of SD-cards can be formatted
We bought the cheapest once that fit a 10ct € coin and they can hold micro SD-cards safely.