storing

What would be the best way (and longest) one could store his valuable data? Like for eg. old videos from childhood etc. I was thinking to buy a spinner and just put them there. Never need to work the spinner, just have a dedicated hdd without operating it. Would that last the longest? What would...

In the family there is an iPad and an iPhone of which i want to have backups of the photos and videos in them. The iPhone's photos are already saved and stored in Photos, the problem is what do i do with the iPad, where do i store those photos&videos?