Last night I plugged it into the laptop and nothing. The card reader works on my laptop though because I tested it. And when I put the card back into my CPAP machine, the machine reacted like it usually does when I put it back in. Interesting that the card reader on the machine recognizes the card but my laptop doesn't.
I honestly didn't believe all those warnings about excessive plugging and unplugging the data card and whether it could eventually wear out because I use SD cards all the time and they never wear out (and yes, I use the same ones over and over). And my impression was that it's usually the card reader on the machine that stands a better chance of wearing out, not the card itself. This card came with the machine and is identified as a data card for the PR REMStar One.
I wonder why this one would wear out while normal consumer grade SD cards don't (with the same amount of use).