Having more than 7 GB in a mail account is an extraordinary waste of space. Who can really store such a huge amount of "not-junk" mail? Well, if you agree with me you must necessarily be interested in gmailfs. A Python program to mount your gmail account as a local directory.
I installed it yesterday and I believe that it is a good alternative to store data by sending mail with attachements. I'm still trying it but so far it is working perfectly. The only requisite is a little practice at the command line for it works with the typical Unix commands.