[super pimp trillionaire]

in the end in re: OP Sorry I missed your keep or trash question, keep them and keep them quiet until you find a drive capable of reasding them and then do so while not connected to the internet or a computer with WIFI BT or any communications connection other than cat 5.
break passwords if you must Definitely break encryption if you must. you want to know what back up you posses. the information on those cassettes could cost you your life.

by making this thread you've already put you and your loved ones at risk.
I suggest you dump all of your electronics in a bath tub full of water and run naked down to your boxers across rooftops to avoid "redlight" cameras all the way to your nearest waterway. jump in it and swim to england, there you can sign up at the wikileaks compound and receive swiss clemency until you can crack the cypher and determine which world figure to blackmail with the tampering of evidence child corn crop figures or whatever shit you got there cuz it must have been valuable for all this shit.
not just a years worth of coffee coupons and gas receipts right?