I have been using my X5 lens with no problems until recently. The micro SD card will not lock in place. It is not an insertion issue as I have been inserting it for months. I have also tried different cards, no luck. Any ideas?

     Did you push it in deep enough, Thats the only thing I could find for it ?  Maybe that spring detente stretched out, maybe try a small screwdriver to GENTLY PRESS  the sd card in place.

good Luck -donnie

Tried all, no joy.

The MicroSD card latch can easily fail and DJI do not exactly use the best components available.
You will need to send in your camera to have the socket replaced.