I am working on a 300+ page manuscript in Libre Office Writer. I printed a hard copy and made corrections, and started making corrections in Writer. When I got ready to back it up, I noticed that the file size was now 393 Kb, where my two backups are each 803Kb. I made only minor changes. The page and word counts are accurate and in line with the backups. I printed out a hard copy; all the pages are there and I don’t see any formatting changes. (It’s basically just text anyway.)
I don’t want to lose anything I have written, but I can’t see any change that would lead to this disparity.