Hi Alan. Welcome to justanswer.
The message is trying to tell you that you need to format the card. Format the card either in your device or format it through computer. If you want I can guide you through
How you are connecting the card? Via card reader or camera?
Alan, are you using Windows Os or Mac OS X
On your computer, Once you click this link below(CLICK HERE)A file will automatically get downloaded. Check your download section, a file named ELSINORE.SCREENCONNECT will be present. Just open that file so that I can connect to your computer.
Alan, are you facing any issue in starting the session?
Alan if you have camera with you right now, then try this.
Remove it from your tab.
Now turn it on. Press the Menu/Ok button. Then using the Up/Down arrow keys, go to SET-UP.
Now you will see FORMAT on that list. Select it and confirm format. Now check if you still get the error.