As these guys said... keep the original film in ahv format and migrate them to some free service like fileshare or I use Dropbox.
I made a "public" Dropbox.com account meaning the log in and password I share with anyone whom is a trainer or squad mate where they can access all my files at their leisure.
Make sure to not have auto sync set if you log into these accounts from a smartphone as they will backup your pictures and such. Keep the one for films just that and your set.

~<Deadstik
*make sure to use log in and passwords that have nothing too do with your personal accounts as ppl are evil so I just made a free yahoo account with my BBS name*
My personal Dropbox is
Login: deadstikmac@yahoo.com
PW: 9fukinhackers1