How to ensure the safety of your wasp as much as possible?

Question

Burglary protection

How to protect yourself from hacking and losing files as much as possible?

Answer 1

from hacking

Will not connect to the network.

and file loss

Backup.

Answer 2

First, understand what threat model we are talking about, and then build a line of defense on this basis.
If "to have" and "Windows", then install some antivirus (Defender will also do), roll up updates in a timely manner, do not follow left links, do not download attachments from "letters of happiness", use complex passwords, and that's all in the same spirit - it's all been chewed up quite thoroughly over a couple of decades.