Originally Posted by Steve W
It's data only. None of the folder and list structure is saved, just waypoints, routes, tracks etc. Clicking on the username under "Cloud Storage' should show you whats been uploaded. In it's present state I don't find it very useful.
Basecamp's 'Backup' & 'Restore' utility will save the list structure and data. But it doesn't write any changes you've made to a *.gpx file you imported into 'My Collections'. To save those changes to a file, you need to do an 'Export'.