John_F wrote:
What device were you using to open the the memory card - a PC, a Mac, a ? ?
If a computer, the message just tells that the file system of the card can not be read. When that happens, do not reformat.
On the other hand most modern computers can read a variety of file format protocols and these have been tailored to be more or less universally readable. Card manufacturers seek a large potential customer-base, so universality is important to them.
A PC John. I am sure the dat is still on the card, the photos were shot in RAW