Whatever you backup online, encrypt it.

Honestly, physical storage is your best bet for that amount of data. Just grab yourself an affordable hard disk drive, connect it to an unoccupied SATA port on your motherboard and then use synchronization software to make a replica of your main drive that syncs multiple times a day.

Its a lot easier than it sounds.

Generally speaking, you’ll want to follow the 3-2-1 storage rule.
(3 Copies, 2 Media Types, 1 Off-site)
Copy 1 would be the original info saved on your main drive or wherever you access them immediately. Copy 2 is a local backup saved to an external hard drive or a home server, ideally one that’s powered off and not connected to direct power (lightning strikes)
Copy 3 can either be a cloud storage backup (such as Google Drive or OneDrive) or a copy kept at a friend’s house.

You want something like backblaze or icedrive.

They’re not cheap anymore (thanks data centers) butnyoud usually want another physical backup and also the cloud. Dont fully trust cloud providers either.

I use Backblaze and find it to be quite reasonable since they have a flat rate for unlimited storage.

Tangential reply: The manner in which your 1TB drive “took a crap” might be cause for concern depending on the precise nature of the failure.

If the hardware is fine, you might be able to recover files on it. This possibility is diminished if you’ve reformatted and put new files onto it, and practically nil if you did a full drive wipe beforehand (or the failure, whatever that was, did something similar.), but the possibility might have been there and may still be there.

If the hardware is not fine, you probably shouldn’t use it for anything important, if at all.

Set up a self hosted server using Linux, the you can add the remote location as a network drive

Consider Proton. The Swiss have kickass privacy laws.

You’ll have to pay for that much cloud storage. How much depends on your specific needs.

Backblaze offers “unlimited” PC backup for $9/month: https://www.backblaze.com/cloud-backup/personal

If you want more control, you can save some money by using a tool that can work with a wide variety of cloud storage providers, and then pick a cheaper provider, instead of using an all-in-one service like Backblaze.

Borg Backup is a free tool that can work with lots of storage providers. This is a great option for more technical users, and there are also some GUI tools that make it easier to use like Vorta (Mac and Linux; I’m not personally familiar with any GUIs for Windows). Borg handles data de-duplication, compression, and encryption. It’s great for local backups as well as cloud backups. I’m not sure what the cheapest option is, but Hetzner supports Borg Backup in their storage boxes, which go for €3.20/month for 1TB.

rclone is similar, though it’s more of a sync tool than a backup tool. Depending on your setup, this distinction could be purely academic. It handles encryption, incremental syncing, and a lot of other advanced uses. Like Borg, you can choose from almost any cloud storage provider or use local drives.

If recommended hetzners next cloud storage shares, they’re cheap and you know what software is running on it. I believe it’s like 5€ a month

Everyone else has answered your question, so I’ll answer the one you didn’t ask.

For physical backup, you want two local network backup drives that alternate in backing up your data hourly when you’re on the local network. That way, you have three copies of the data and if one fails, you can swap it out.

Then you ALSO want rotating backups that get stored off site (eg in a safe deposit box). Every 3 months or so, you take the one of these at home that’s 6 months old, back everything up to it, take it to the offsite and retrieve the other one.

This means that if something corrupts your data and you don’t notice until your local backups are also corrupted, you have two older snapshots — one of which is somewhere else, so if your home gets destroyed you still have a backup.

The cloud backups can be layered on top of this as desired; they all serve different backup purposes.

There are a huge number of online companies to store your data. Google, Dropbox, Box, and about 100 nextcloud resellers, just to name a few. They all have tutorials on their sites to explain how to upload your files for safer keeping.