OSM Maps on Nüvi 30 gps
The little nüvi GPS from Garmin are (at least when I bought ours back in 2011) cheap, nice little devices for non-internet dependent navigation.
One problem I wasn't able to overcome until recently was getting updated maps in the form of OSM streetmap exports recognized on the device. Yes, I had downloaded Garmin formatted maps from various sites. Yes, I had put them on the SD card in a folder named "Garmin". No, they never showed up. Turns out for some nüvi devices, including the nüvi 30, the folder needs to be named "Map", as mentioned offhand by someone on a forum. Yes!!!