when you install Pages.
Your documents are stored, by default, in the Documents folder while Pages is installed in the Applications folder.
How to backup.
Use an external hard drive and use Time Machine
Copy your documents to a CD/DVD
Open a Dropbox account and store them up there
i have bought one license (in one acc) to my pages, but i had to give that one away, so i got a new one (in another acc), if i reinstall my pages will i lose all my files?
also, how do i backup my files?