Yesterday I encountered something I've never seen with my SD card and M9. I took about 30+ shots and everything seemed normal. I setup the camera up to allow me to "chimp" as long as I keep the shutter pressed and was seeing everything. Then, when I picked it up 10-15 minutes later to review some of the images, I noticed I lost about 10+ shots. I'm pretty sure I took them because I remember there was one I really liked and I wanted to show it my wife, but it was gone.
I began to feel a little uneasy, wasn't sure if it's the memory card or the camera itself. I removed and reinserted the card, and the camera started to report "No SD Card". I immediately swapped to a backup card because I didn't want to risk losing any pictures, and all was well so I think we can rule the camera out as the culprit.
Back at home, I was able to import in all the photos (minus the ones that were lost), I reformatted the card in camera and it seems normal again. But now I'm not sure if I should continue to use it or if I should just toss it. The card is almost 2 years old and had around 11k pictures written/read/erased. Has it reached the end of its life?
I know people always recommend formatting in camera after each import, but I've been doing just a regular delete all without any troubles (until now). I wonder if that could be the problem. Any insights will be appreciated!