https://www.howtogeek.com/3-cool-things-to-do-with-the-sd-card-slot-on-your-nas/
3 things you can do with your NAS's SD card slot (besides ignoring it)
SD cards and NAS servers go together like peanut butter and marshmallow fluff.
thingsnas
https://hackaday.com/2018/08/17/no-sd-card-slot-no-problem/
No SD Card Slot? No Problem! | Hackaday
sd card slotproblem hackaday