Copying e-mail folders onto hard disk


New Email
Is there a way of copying my e-mail folders to a folder outside of e-mail?
(i.e. onto my hard disk)

I have been saving a lot of old e-mails for future reference(like newsletters)
so size of some of my e-mail folders are getting very large. If I can copy them onto my hard disk then I can clean up my e-mail folders.

Of course copy on the hard disk must be readible.

Best regards. Thanks.:thanks: