I guess I have to many waypoints was trying to load a boat lane card but it is not seeing it. Is there a way to download waypoints from each lake to its own card? Need help please

Yes it is possible using HumminbirdPC. Can you describe the procedure you followed? In the past, the Boatlanes came in a zip file and I’m guessing it still does. You have to unzip the file on your computer. You should then have a folder named matrix. Inside side that folder should be a file named DATA.HWR This is the file that has all the waypoints. In that folder will also be some files that start with 000.HT These are are the tracks. The number of HT files will depend on how many lakes you purchased.
Copy the MATRIX folder to a card that is 32gb or smaller. Make sure those files are inside that folder. Boot your unit all the way up, then insert the card. You will probably get a message mentioning an “encryption” file. Remove the card for a couple of seconds then reinsert the card. You will get a message asking if you want to load the data. Just follow the prompts at that point. All the waypoints should load unless you do actually have too many waypoints. If you do not have the maximum number of waypoints on your unit, it will still load waypoints until the unit reaches the maximum number of waypoints. I don’t remember for sure, but I think your unit holds 2750 waypoints.