Thanks for all the help everyone.
The good news is that on youtube someone had posted the card AFTER hers....
We managed to contact them, and they still had the original file which included the card in question!!!!
Brilliant.
However for future I would like to lock it so I can't accidentally delete it. I have tried the "lock" function - however the "delete" option is still available, and I don't want to risk clicking it to see if it wants a password BEFORE it deletes it in case it doesn't!!
I would in future want to copy any similar file to a external hard disk - but I am tearing my hair out as it has the option to "Move/Copy" but won't let me copy it anywhere!!! This is a really stupid operating system - not logical at all.