This dude also talks about 10gbs and speeds required for video editing. That’s something you don’t get with your average internet connection, and even if, it’s unsure your average cloud service provider can match.

Amazon Glacier

Your condescension is matched only by your reading comprehension.

Bruh. Look into a mirror.

I’m stunned that you are unfamiliar with the versioning feature of backups. In my bubble this has been best practice since Apple came along with the Time Machine, but really we tried that even before with rsync, albeit only with limited success.

This is different from git because this takes care about all files and configurations, and it does so automatically. Furthermore it also includes rules when to thin out and discard old versions, because space remains an issue.

Synologys backup tool is quite similar to Time Machine, and that’s what I am using the second NAS for. I used to have a USB hard drive for that task, but it crashed and my old Synology and a few old disks were available. That’s better because it also protects against a number of attacks that make all mounted paths unusable.

Git is not a backup tool. It’s a versioning tool, best used for text files.

Raid is no backup. Raid helps you against drive failure.

Backup helps you if you or some script screwed up your data, or you need to go back to last months version of a file for whatever other reason.

Aws helps if your house burns down and you need to set up again from scratch.

Same, although aws is my plan b. For plan a I have an older Synology that is a full backup target.

I have done this with calibre and a Kindle, worked fine.

Nowadays I prefer reading on my phone, and loading ePubs on any eBook reader is a non brainer.