"But I understand it would be would be faster to analyze only the most recent logs on your local machine."
Exactly. If I had to work with a log file containing 3 weeks of data, it'd be close to 50/60 meg during my site's busy months.
"Anyway, I am not sure about deleting the file when you are done downloading. It might work, it might not."
If allowed, I'd delete the file and recreate it.
Hopefully, one of the tech guys can let me know what's permitted.
Thanks again, Dave!