on the other topic - when you 'add' your file by upload to the files collection (likely a good idea to use it - as it separates a table that will likely consume a rather high amount of space (and you may want to manage it differently than your 'spots' collection).
In the add event for your file - the column 'original file name' is getting populated from your camera event - go into the mapping and map the file name to to a local storage variable as well (you can drag and drop data from a source - to multiple destinations on the right side of your mapping).
In the add event for your spot (mapping BEFORE) - map the local storage variable - to your your column in your collection.
Not sure if that's the help you need - let me know if that helps...
Best,
Bruce