I have been watching this thread, and I wonder if there is not some kind of issue with these memory cards anymore. I use micro SD, Sd and CF cards for radios, cameras, and other devices and in the past year - right across the board - I am finding more and more issues of incompatibility with these cards.
For example, my laptop might read a SD with the built in card reader, but change brands and/or spped, and it will only read the card if a use a new external reader. Sometimes updated drivers work, sometimes not. I also find issues with card reader using USB3 and USB2 ports at times, and lastly, I might have two cameras, same brand, but different models,a nd one will use one type of SD card but not another. Might be just a difference in the brand of card.
Just saying, other forums dealing with other areas that memory cards are used in, you are seeing these issues more and more all the time. I think the issue is bigger than just Uniden