Hi, I've had the same issue with the inability of my Mega to both receive GPS data and read/write to an SD card. Could you please post the code that you now have successfully running? I'm not sure how to remove SoftwareSerial from the code, as TinyGPS uses it in Setup() to establish the tx/rx pins. Thanks! (The project is an autonomous boat that requires GPS for navigation and we'd like to have a record of locations)