@csumi21 as far as I can see there is no native "format" command in Total Commander. You can right-click/format a drive letter, but that is just invoking a windows DOS shell command, and does not...

@Brook Yes also been there. In my case the camera will not format the card but in addition neither will anything else. DiskGenius reports no problems with the card. Windows refuses to format the card...

Turning off 24-recording made no difference and the cards in both my NC450 will not re-format. After all these queries concerning the same issue I think we can conclude there is a systemic problem...