That looks like the correct file. Try it this way... go to our website by using the link below. In the top right you will see where it says charts, click on that and it will take you to all the charts. Use the filters on the left side to get to you area. Anything with a zero dollar value is free. Download those and load it as you did with your other charts. What size SD card are you using and do you know the software version on your MFD12? https://www.furunousa.com/en/products/gps_and_chart_plotters
Not sure exactly what the issue was, but I deleted everything in the data catalog--they were old anyway. Several times during the process, the MFD had a fatal error message that requred me to power-off/on the unit. Once everything was gone, I created a new SD card w/ all of the free raster & vector charts, as well as the paid vector chart. SUCCESS!
I have now removed & reloaded all three of my units and everything appears to be working.