Canon 50D I can't get the CF Card to Format. Need help.

[Original katomi]

Just for info
There are adapters that allows you to use a sd card in your camera.... stay away from the cheap ones.
I use sd cards a lot and thought I would save cash by using an adapter. They did not work , sometimes the pic would not save, transfer rate was appalling and to add insult to injury the adapter got stuck in the card slot...

 

[Original katomi]

On windows 7 the command prompt can be found in accessiories