Thanks everyone for your help, advice and comments - I havent given up yet and will update more so hopefully it can help someone else out.
Cheers
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This sounds like it may be the problem...I have noticed a few times everything is running fine and then suddenly getting the No Micro SD Card error or a crash mid-game and then looking in Storage options and there is no SD Card listed - how did you go about repairing this?
Cheers
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I had the same problem as this poster. Indeed the connector on the main board (not the SD module itself) was broken. The constant taking in and out of my microsd caused the break. Nintendo didnt secure it very well. Just a very tiny screw and that's it.
This sounds like it may be the problem...I have noticed a few times everything is running fine and then suddenly getting the No Micro SD Card error or a crash mid-game and then looking in Storage options and there is no SD Card listed - how did you go about repairing this?