GetExternalFolder returns the path to the external micro sdcard of the device.
app.GetExternalFolder() → string: path to file or folder ( “/absolute/...” or “relative/...” )
Normally it is smth like “/storage/extsd” or “/storage/extSdCard”
See Also: GetInternalFolder
Example - Show External Folder
var dir = app.GetExternalFolder();
app.Alert( dir );