Note: This FAQ only applies to the following cameras: HD30, HD300, HD310, HD40, HD80, HD810 and HD90. Other cameras have newer hardware and higher capacities. Check your camera's specifications documents for more information.
You can use any class MicroSDXC card up to 64GB. This will hold approximately 30 hours of data at the maximum camera resolution (1920x1080). It saves the video files on the SD card in a series of 5 minute long .avi files, and you can access the recordings via any card reader that reads MicroSD cards.