Garmin Nuvi 2577 - Additional Maps problem

Works perfectly now. Many thanks!!!!

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goldfish Reviewed by goldfish on 2nd April 2019. Garmin Nuvi 2577 - Additional Maps problem I have a very nice used Garmin Nuvi 2577 bought off Ebay and have installed 4 maps on the internal memory as it is a good size. Only 2 are recognized by the unit. I have named them gmapprom.img, gmapprom1.img gmapprom2.img and gmapprom3.img. Only the first 2 are recognised. What is the naming convention or file structure required for the 2577 please? Or is it limited to 2 maps on internal memory? Thanks. Rating: 5