I currently back up most of the files on my computer with a program that watches files and uploads them to cloud whenever they change. I'm wondering if this would be an effective way to back up my Thunderbird profile, given that I usually have Thunderbird open. I've noticed the [[Profiles - Where Thunderbird stores your messages and other user data|article]] on profiles says to close Thunderbird prior to copying the profile folder for a (manual) backup. Is that just to prevent users from getting tripped up by the lock file? Or is there another reason for it?