I have multiple 5TB USB external hard drives. * Identification docs (scanned passports and license copies from my family and I). * Wikipedia copy. * Tons of electrical and mechanical engineering part data sheets for if I have to fix a system. * Medical PDF guides. * Water treatment guides. * Chemistry guides (important guides are bleach and HHO generator guides). * Road Maps of the US, my surrounding states, and local area. * PDF of my car’s engine and all its parts. * Temporary solar how-to guide (I have a lot of homemade portable equipment for this). * I made a doc for repairing my portable gas generator. * Popular and emergency radio frequencies list (I have a HAM license). * Movies, some TV shows, and music.