Carolyn,
You did the right thing in saving a backup to your computer. With the price of SD's being so cheap, I now keep a backup SD. My hard drive crashed a month ago and I lost all data :MAD: but I still had the backup SD.
A friend of mine had the same thing happen. He removed the card while it was active (light on).
cheers,
Fran in Florida
PS...Keep your eyes on the Forum as there will be another Florida Jam in the near future. Particulars will be posted soon. Short drive from Bama.