Hoping to retrieve data from an SD card. Our story so far:
Inserted a 4GB SD card into a USB reader on a Win10 PC. The computer saw a directory prefaced by a dot (.Spotlight100), which contained the two sound recordings I made yesterday (Zed001.WAV, my test recording, was 20 MB; Zed002.WAV, the real content, was 450 MB).
Computer couldn't open or copy Zed002.WAV, so the first thing I did was change the directory name (to max), in case it didn't like that dot-prefix directory. Changing the directory name made no difference.
Next think I did was run chkdsk on the SD card; this process was successful, but Zed002.WAV is now 311MB. Opening it, I can see that it has a good quality recording of the first hour of content.
So right now I'm freezing. The SD card is still mounted. Hoping for advice of good solutions to rescue any data that might still be floating around on this card.