S5 CF card write error
"Format the cards in the card reader on the computer." BUT do not click the quick format box. Only a format that overwrites the whole card will 'potentially' remap the bad sectors.
In addition to using a separate card, use one with less capacity. I've been a Kingston user for as long as they've been in business and have noticed a drop in quality since they've been focusing on being the cheapest. Their slow cards seem to be more reliable than their fast ones. Even SanDisk is dropping.