The 3-2-1 data protection strategy recommends having three copies of your data, stored on two different types of media, with one copy kept off-site.
I keep critical data mirrored on SSDs because I don't trust spinning rust, then I have multiple Blu-ray copies of the most static data (pics/video). Everything is spread across multiple locations at family members.
The reason for Blu-ray is to protect against geomagnetic storms like the Carrington Event in 1859.
[Addendum]
On 23 July 2012, a "Carrington-class" solar superstorm (solar flare, CME, solar electromagnetic pulse) was observed, but its trajectory narrowly missed Earth.
The 3-2-1 data protection strategy recommends having three copies of your data, stored on two different types of media, with one copy kept off-site.
I keep critical data mirrored on SSDs because I don't trust spinning rust, then I have multiple Blu-ray copies of the most static data (pics/video). Everything is spread across multiple locations at family members.
The reason for Blu-ray is to protect against geomagnetic storms like the Carrington Event in 1859.
[Addendum]
On 23 July 2012, a "Carrington-class" solar superstorm (solar flare, CME, solar electromagnetic pulse) was observed, but its trajectory narrowly missed Earth.