I'm having the same issues. Kept forgetting to purchase a micro SD card...finally did today and upon installation, it does not recognize card at all
...now, all of my images are gone and I can't use the camera because no SD card..."insert storage device before using". What!? I've been taking pictures on the internal storage for 20+ months! and now THOSE are gone!
Just inserting an SD card should not have deleted the photos stored in internal memory. Connect your phone to a PC, open the phone Icon on your PC,in my case it's Droid Razr HD > Internal Storage > DCIM > Camera. Your photos should still be there. If they are there, then copy them to a PC for backup. You may have to go to Settings > Apps > All > Media storage and clear cache and data, then reboot your phone for photos to show up in the Gallery again.
For the SD card, format it on the PC if you can, then insert it into your phone making sure that it fully seats into the SD slot (this is important).
I have a similar problem.
Droid Razr M
Recognizes an older Kingston 2GB micro SD card. Can unmount and mount.
Bought a SanDisk Ultra 32GB micro SDHC I (think it is a class Ultra 1?) in December. Worked fine for about 5 or 6 weeks. I was able to put podcasts, photos, etc. onto the 32GB card and access everything from phone. About 1 week ago, phone stopped recognizing new 32GB card. 32GB card can be read fine by my PC using built in SD card slot and micro SD adapter. When I put this 32GB card in my phone, it does not mount. I have re-booted phone with and without the card installed, etc.
Here is a link to what the sd card looks like:
Copied contents to PC. Reformatted card. Phone still does not recognize card.
Installed the SanDisk Memory Zone App - still doesn't work.
Is it possibly a driver issue? How can we get someone at Motorola or Verizon to look at this?
Looking for a solution.
Remove the card from your phone, mount it on your PC, copy everything from your SD card to the PC, reformat the card with the PC, reinstall in the phone. The phone should now recognize the card. You an then reformat the card on your phone if you want to.