and everything is encrypted. i use truecrypt to make 500GB volumes and give each a different 64 digit password (0-9 a-z A-Z and every character from (hex) 00 to FF) (i'm autistic, i can remember all of these passwords)
imagine if the police size all of my hard drives.. they will have 2 weeks to crack my passwords before i use a court order to take back my "personal data" (legal hint: keep one tax form with your personal data on it in an encrypted volume of 10 mb or something, then the police in the eu can only keep the computer/usb drive/hdd for 2 weeks max(if you ask your stuff to be returned by the court))
i keep everything, in 2011 i will start recording my internet traffic(wireshark).