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I have a couple well worn memory cards. It seems that they like to break in a way that makes the pcb retract into the shell. I looked at what I could stuff in the back to stop this and found that zip ties do the job.
The extra glue is there to slow down a crack that could break a piece off. The result isn't great, but it's also not too bad.
Here's a picture of a good card โ see how the board is held in place by two tiny plastic posts. Great design.
Sometimes, it's just about finding something that works. I'm glad that solved the problem for you.