I'm using a Micro Center 512GB microSD card, with the included SD card adapter. My Tangara's SD card holder feels very loose, and I've had to perform fewer than ~30 SD card slot insertions while doing my initial tests of Tangara. It's loose enough for me to make the black SD card slot cover fall out if I hold my Tangara in one hand and strongly tap it against my other hand ~3 times.
It's also loose enough for me to see the cover start to wiggle less than ~1mm when I nudge the cover on either on the far left or right end of the metal slot cover.
It's also loose enough for me to see the cover start to wiggle less than ~1mm when I nudge the cover on either on the far left or right end of the metal slot cover.