@Paul ********
each time you do a report, go back in and search for it and save the pdf. They're only available for 7 days. Just upload them to Google drive or something so you always have it available.
If for some reason you forget, just file a new one. TM30s are filed constantly. If you go stay at a hotel somewhere they file a new one for you and then you file a new one when you get back home. Just say you went on a weekend trip and filed a new one when you returned.