I remember reading (but can't remember where) that the GPX files can be stored on the memory card in an Etrex 30. How do I do this so that I can access them? Just tried but can't see the file when I switch on the unit.
The GPS memory and the mSD card have parallel directory structures. So you can put anything in either location and the GPS will find it.
On the E20/E30 GPX files have to be in [Device or card]/Garmin/GPX/
(Warning: Edge users this is NOT the same! You have the /NewFiles/ directory. Warning Etrex users ignore this line!!)
However from experience with more than one Etrex I would strongly recommend putting your GPX files on the device memory, not on the card. This is because files on the card can occasionally 'go missing' ie not found and synched on boot-up, presumably due to a temporary bad contact on the card. Stored in GPS memory, this isn't an issue.