Install multiple maps to a SD card


I have downloaded and installed into Basecamp, OSM topo maps for several regions in the United States.

The Install Map command in Basecamp, will allow me to install only one of these maps to the SD Card at a time. When I repeat this operation with another map, the previous map is deleted from the card.
Is there a way to install all the maps to a SD Card using Basecamp?

The folder for the unzip maps does not contain a *img file.

Is there another 3rd party software program to install these maps?

Well ...

You don't say which device you have but BaseCamp will install multiple maps, if you're having an issue with this simply rename the map BC has sent before sending the next one, that way it won't be overwritten. Note though certain devices cannot handle more than one map on a sd card.

Where there's a will ... there's a way ... DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20