Importing Maps to Offline Devices without Wifi/Cellular Data

[BobsBlueNorth]

I have several "air-gapped" end user devices (smart phones with wifi/cellular removed). I would like to be able to import map files to the Meshtastic App via the USB port.

Is there a way to create an option within the app to point it at a map source other than an online one and have it import it for true off line use?

I attempted a search to see if this was talked about already but I came up with nothing. Apologies if this as been asked already. Please point me to the relevant thread if that is the case.

[BobsBlueNorth]

I also am finding that even with the devices that have an online connection when I go to download the region it never makes any progress. It just holds at 0/XXX tiles downloaded. Is this a bug with the app?