Great question, slickh20. The 2nd generation adapter stores up to 8 hours of driving data from the past 30 days. Once it reaches its limit, it stops storing data. As long as the adapter was receiving a clear GPS signal for those drives, they should all load in as fairly accurate trips after your next connected drive. If there's a lot of data to dump, it can take a fairly long connected drive, or a couple of drives to dump all the data and catch up to real time.