Good an not good things

Good - I found overview of all mailboxes
Not so good - local mail folders are locally collapse, are somewhat hidden
A description of what is contained in the individual files in the em directory and what they are used for would also be helpful!

locally expanded

locally collapsed

A description of what is contained in the individual files in the em directory and what they are used for would also be helpful

Not sure why you need to know, as “all those files cannot normally be separated” or you can risk eM Client not working at all or possibly corrupting.

I don’t change that, but want to know what they do!

In TB I know about the task of the individual files!