I am currently using outlook for mac 2011.

My main identity is getting bigger and bigger.

Now it is around 400gb+ and getting to 500gb.

I will require all the data inside but i would like to do a backup just in case the outlook crash again and i do not have enough space for the database to rebuild.

I was thinking of using Time Machine to a backup.

But i heard that when restored from Time Machine, it will need to rebuild. I doubt i will have the space for it.

Is there any alternatives? Something like "creating pst and put all the mails in" kind of thing? I have an hard disk which i used for time machine backup...

I need some advices pls...