I remarked after installing Windows Live Mail this past weekend:
WLM doesn’t have a database structure; it saves each item as an individual file. I’m guessing that this will make life easier, at the expense of disk space.
Maybe not. The Retained folder, which is usually my largest, took up 74.1 MB as an Outlook Express .dbx file.
With the same number of items (5,702) stored as individual .eml files, as WLM is wont to do, total space used is 67 MB.
We will not entertain questions as to why I am retaining 5,702 emails. (Actually, there are way more than that, but this is the generic retention folder; there are others.)