I’m not sure how many files it checks. Per How does Duplicati Resume After Interruption? (less scary title) reply, I could see it checking on files (maybe big ones) that might have been stopped short, but that’s not the case here. Possibly this backup will be a chance to get another report on what it looks like. Note it also has to enumerate all files, which is even less of a job than scanning file changes. Personally, I don’t tend to watch the GUI that closely.