Ken,
You should not have to format the card. Just go power on your unit, insert the card and see if it will make a snapshot. Make sure you have the snapshot feature turned on.
It sounds very exciting. I would recommend making a recording versus just taking snapshots. Not sure how big of an area it is, but you may want to set up a search grid and run some lanes. Also running straight paths at different angles to the object may yield some better images by getting different views. I would also recommend scanning at 455khz and then go back and repeat the scan again using 800khz.
Once you have made the recordings, you can play them back and adjust your settings to get the best image and then make your snapshots. Keep the recordings short, maybe 10-20 minutes long.
Good Luck,
Robert
If you do need to format the card here are some instructions:
Reformat using SD Card Reader
1. Turn on your computer and put the SD card into the card reader slot on the front of your computer or the external card reader attached to a USB port. Wait to see if your operating system automatically opens a window prompting you for information. Click on the option to "Open a folder to view files" if the window pops up.
2. Click on the "Start" button if your operating system does not automatically prompt you to open a folder. Choose the "My Computer" option to bring up a new window.
3. Right-click on the drive bay for your card reader, and then choose the option that says "Reformat" from the pop-up menu. Click on the option to set the formatting to "FAT16" if you receive a separate pop up window asking you which file system to set the card to.