Bigger is better sometimes BB
All I have is bout 3000 waypoints.. Kinda figured 2GB card was plenty for that and I've never taken a pic or recorded anything far as I know.. All I know is when you turn unit on it takes a while to load and I can't save any more waypoints figured simplest solution was a larger GB card
Strike King Prostaff
Single pole Mafia
Bigger is better sometimes BB
Ahhh... I know what the problem is... The waypoints are written to the internal memory of your 998. The internal memory only holds a maximum of 3000 waypoints. To get the waypoints to the SD card you have to export them. When exported to the SD card they are small in size (my 1200 points are only 40kb file size). Looks like a bigger card will not help you. Might have to delete some or use Humminbird PC to select the ones you want loaded or not loaded to your unit.
DoubleG