We are collaborating on a 40 pages long report written in MS Word 2013 and MS Word 365 (this depends on the age of each collaborators computer) which contains a lot of images. The file grew to 357 MB, which is way too much for that document.
When I changed two images, both with the very same file format and resolution, the resulting file increased by less than 500 kB. The images are over 200 kB each.
The revisions feature is on, which may cause this growth, but I've faced similar issue with documents without this feature even available.
Is there a way how to clearly identify the cause of such file size growth and anticipate this effect while keeping the revisions feature reasonably useful?