There's another reason why DVD's are obsolete: you create them by burning layers of a dye, which degrades in just a few years!
Thinking of archiving your astro data with external mechanical hard drives? Nope, they fail in a few short years as well.
What about solid-state drives? Sorry, mate, they're actually your
worst choice: they all have bad blocks from the moment you buy them and these grow exponentially with time. The data loss accumulates much faster in this type of drive.
So, how are you supposed to archive data? Currently, the only quasi-permanent methods are burning onto M-DISC (look for the M-DISC logo on the drive) or Blu-Ray HTL (
not LTH). You can read more here:
https://www.pcworld.com/article/2984...your-data.html
-- sutekh