For good long term storage stay away from pdf also. Is is based on postscript but is an adobe propritary technology so if Adobe decided to change it your stuck. Also don't rely on the password of a pdf or word doc to keep people from opening it, thats all the furthur I will elaborate on that. Also jpg's are a lossy compression. Even though the file size is bigger tif is a non lossy format (non compressed). If you want to compress then compress with zip, gzip, whatever afterward. Interesting point of trivia, tif format is how fax machines store data internally. Since my career/hobby/life revolves around computers my laptop if a big part of my preparations. My most recent purchase was a 3 lb laptop so I can take it with me easier. When I undress for bed and unload all my gear from my belt and pocket it ges on top of the laptop bag (which is designed to fold open and allow the laptop to be used without being removed from it) so everything is in one place ready to go.