Chinaman wrote:
Always better to delete or reformat the cards in the camera. Less likely to have any trouble.
I agree. Formatting the card with the camera ensures that the camera will recognise the card, especially if you use the same card on other devices. It also clears the card of any corruptions and unwanted files that may accumulate over time. Delecting images only delete image files. I find it quicker to re-format a card than to delete the unwanted images on it.
Right. Formatting is faster than deleting. Just like a computer hard drive, deleting files does not actually delete them. It just makes them unavailable to the operating system. That's why there are programs that can reclaim deleted files. Formatting the media wipes it clean - more or less.