“If only the rendered film, you might look into getting some cheap online space in addition to hard drives.”
For as long as the online storage company stays in business or you continue to pay them.
As to 100yr Blu-Ray, film and shellac/vinyl/whatever are the only mediums I can think of that have lasted 100 years are still playable. Oh, and paper piano rolls. Current Blu-Ray formats are already being supersceded in labs. You think someone will be able to find a working Blu-Ray drive in a hundred or even 30 years? They still sell them, but have you seen a ZIP drive lately? CD was by far the most widely used optical medium for audio and storage and it is on the way out.
On the other hand, I have seen large stores of mainframe oil exploration data in storage on tape here in Houston. Wanna bet I can find a drive to play them back?
IBM essentially invented the modern disk drive and they say use tape.
Tom and Thomas, you are most welcome.
I hope you folks are having a good eve/whatever,
Robert