[theandrewbailey]

Writable optical media may or may not last 10+ years. Solid state drives seem to check all your storage requirements, but it's unclear (to me) how reliably they store data that long.

I've had good luck with hard drives, but I've never knocked one off a shelf, nor do I have any strong magnetic fields in my house like you seem to. I keep them in my basement, one in a lockbox.

[Yawrehto]

I don't have strong magnetic fields in my house (as far as I know...) but I am the bad combination of clumsy, anxious and forgetful. They're not a big worry for me either (I don't plan on sticking them to the fridge). But

[tiernano]

M-disk? That's meant to last 10+ years…