I'm using SanDisk & Fuji - presumably they were pre-formatted, 'cause they worked from the outset.
When I've 'moved' the photos, it seems to have deleted them from the card, which I've put back into the camera, and carried on clicking.... and so far ok.
But maybe from now on, the wise monkey
will be 'moving' the pic's to pc and putting the card back into the camera for a 'format'.
Oh,
Good Luck!!!