a) can confirm the ongoing wipes. My e-mail provider (used for over 20 years) deleted all saved mails and all outgoing mails.

b) the "Library of Alexandria" allegory represents a sleight of hand for accumulation of suggested information (want) over adaptation to perceived inspiration (need). We exist within a system that communicates itself as perceivable inspiration; hence always available, yet are being deceived to ignore perceived (reality) for suggested (fiction); which gives the power of defining; redefining and contradicting the suggested information to only those suggesting it. While this exploitation happens; the ongoing flow (inception towards death) corrupts and destroys the temporary form (life) within unless resisted by adaptation; which is what one ignores when choosing want (suggested) over need (perceived).

All the narratives the few are suggesting to the many are designed to keep the many ignorant of the natural order (flow to form) aka of the ongoing system that inspires the resistance of those within. Instead the many are tricked to follow suggested orders; hence moving with the flow (towards death) instead of resisting (for the sustenance of life).

If you're doing perfectly legal digital backups of books you own make sure to have multiple backups on and off site.

What I usually do is buy a new external hard drive every couple of years (especially when it's full), copy everything over to the new one, and then keep adding to the new one.

A spare hard drive filled with stuff you want to keep and completely unplugged from your system is a good idea in general, especially if you have a computer that never gets on the internet (single board computers and old laptops are great for this).