Having similar issues after using the microSD extender.
https://forum.pine64.org/showthread.php?...5#pid94175
I measured the adapter and a microSD card with a cheap digital caliper.
The extender is a uniform 0.97mm thick.
The microSD card is 0.71mm thick on the end that contains the contacts. The lip on the opposite end is 0.96mm.
That 0.26mm additional thickness is probably compressing the spring contacts past their normal position and they can no longer make reliable contact with the thinner microSD card.
https://forum.pine64.org/showthread.php?...5#pid94175
I measured the adapter and a microSD card with a cheap digital caliper.
The extender is a uniform 0.97mm thick.
The microSD card is 0.71mm thick on the end that contains the contacts. The lip on the opposite end is 0.96mm.
That 0.26mm additional thickness is probably compressing the spring contacts past their normal position and they can no longer make reliable contact with the thinner microSD card.