The MyLog.db3 on the laptop here is 3,343 KB
The number of records in MyLog is 10,459
I don't tend to keep the laptop MyLog up to date, so it's the desktop PC that has the accurate count and I've posted that elsewhere in the Forum. I just copy MyLog.db3 to the laptop every now and then.
The 11,425 records that were in my desktop MyLog can't result in a much larger file. It's worth noting that this represents 2 years of reception using the SBS-1 and RadarBox - I imported the SBS-1 records then deleted the duplicates.
Steve, I think that you are wrong about the maximum file size. My NavData.db3 file is 18,614 KB. Remember, the db3 file is a SQL file that just happens to have a db3 extension. It's not a dBase III file.