Honestly, i have delete 2 crashes/accidents years ago because i didn't felt like i wanted them online at that moment.Being new to all this I have been pondering this very question. I think for now I am just keeping it all organized by project and then I will ultimately get externals or just delete. I feel like external drives are pretty cheap in the long run but I am not sure I will ever actually need any of that footage. I just hate the idea of parting with it all after spending so much time on it. It will likely be like my closet in the basement that has stuff that "shouldn't" be thrown out but sits untouched for years!
Nowadays i kinda regret that i deleted that footage. Could have been an interesting learning video, for myself as well.
Same as certain stuff you throw away when moving sometimes end up the stupid thing to do xD