The export()
method copies the stores, along with all necessary tiles, to a seperate archive at the specified location (creating it if non-existent, overwriting it otherwise), in the FMTC (.fmtc) format.
{% embed url="https://pub.dev/documentation/flutter_map_tile_caching/latest/flutter_map_tile_caching/RootExternal/export.html" %}
await FMTCRoot.external('~/path/to/file.fmtc').export(['storeName']);