Sure, one can have too many backups. When those backups are taking up space that other more at-risk or more useful data could be taking, then that's a bad thing. When those backups are not actually useful, then the making of them was a waste of time and effort. When making those backups makes people think "ah, there, I've solved it" and then they do nothing more, that's bad.

It's like all those people switching over to paper straws instead of plastic and thinking that made a lick of difference to ocean microplastics, or whatever. I'm all for taking action to try to help with problems, I'm just saying that it's best to take actions that actually help with stuff.

Maybe instead of buying a portable hard drive to stick that backup onto, donate the money to one of those international chapters I mentioned.

They were one example. As I said,

Internet Archive, for example

In my next paragraph I mentioned the international chapters of Wikimedia Foundation, they're another example.

Trump can't erase Wikipedia. He can disrupt the smooth functioning of Wikipedia, though, which is the thing I was pointing out is a bigger concern. That's not something that can be solved by randomly scattering yet more out-of-date database dumps in peoples' closets. That's something that the Wikimedia Foundation itself is best positioned to work on, they're best positioned to ensure there are fail-over options to keep en.wikipedia.org running in the event that the American government goes full authoritarian on them.