Is there a hard limit on the number of maps which are available in the map selector? I am using a GPSMap 64s with the latest firmware (v6.60) and transfered 20 maps (IMG files) onto the SD card's /Garmin folder but I can only see the first (alphabetically sorted) 12 maps in the map selector.
To ensure it's not some faulty map files, I also deleted a few maps which were shown on the device and after that the next maps showed up (again only 12 in total), which were hidden before.