Would be very interested in the topic if you make a post.

I do not know what system will work best and could survive any real data purge. I am not well versed on the topic but I think just an old fashioned way of focusing on one or a few subjects one is really interested in; condensing that information in PDF or saving the videos/audio that really matter and keeping them on local drives that are not connected to the internet are best.

I think it must go beyond simply saving and archiving everything, you need to organize all the data you have once you want to really use it, say in 10 years (supposing the current system continues), you want to inform someone about something. You will have to use the language of the day to get the message across. I only save what is important for particular subjects I know are important.

I wouldn't be surprised if a point is reached where they automatically delete the files they do not like remotely (especially on windows 10) Any online system is compromised, AI is getting better and the internet is getting faster everyday.