32GB Sandisk Micro SD suddenly stopped being recognized by Galaxy S3 phone

   I had kind of the opposite problem. My new 32Gb Ultra card wasn’t recognized in any device except my Kocasio Tablet, which said it had 157 *megs* available. Using the adapter didn’t help. Then I tried one last device: a polaroid HD camera, with the adapter, and for some reason that got the card recognized. I immediately reformatted the card, and now it seems fine - recognized as 32GB in all devices and working (although it seems  a little slow) in my tablet. Is there any way to tell if these cards, which don’t seem to have serial numbers anymore (in the photo, anyway. Do they in reality still have them?) are counterfeit?