I am glad that in this case my colleague's solution worked, but make no mistake, habitually deleting files from your SD cards in camera is a bad idea. If you would read my post I explain why - I'm a certified IT engineer.
Further, if you are writing to dual cards in the camera, don't forget to format BOTH cards clean in camera after you have confirmed transfer of the files from the camera to your computer.
If you want another reference, see the following post by well-known photographer Jeff Cable, who holds a senior position with Lexar storage management systems.
Jeff Cable's Blog: Why you should not delete images on your memory card using your camera - and othe...
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
