The cheapest of these plans is $8.33 /month for 1 TB of backup space and support for 10 devices (and three sub accounts), if you pay for a whole year at once. You can add more for the same price and storage, like another 1 TB for another $10 /month. The maximum storage plan you can pay for is 15 TB, but if you want more you can contact their support team.
Carbonite is online backup only, so it doesn't really work well for local backups or backups to external drives. You'll still have to handle that yourself. You can try Carbonite for free for 15 days, but after that you'll need to pay up $60/yr to back up one computer with their Home plan, $100/yr to back up one computer with their Home Plus plan, and $150/ur to back up one computer with their Home Premium plan. You can read more about Carbonite's plans and pricing here.
With the WinX YouTube Channel Downloader, you’ll need to download their software before you do anything else. Now, this system does have a paid version, or you can check out the free trial first. You get to choose the URL that you want to download and it can auto-detect all of the information about that video, including the format and size and even the resolution. But you still get to make the final determination. From there, you just click the button to download, and you’ll be ready to go.
If you’re looking to download a whole YouTube channel at one time, this is definitely one way that you can do it. WinX YouTube Downloader can download over 1000 URLs. Even more, it has support for different YouTube playlists and channels and even gives you the ability to record your own live videos, so this is one platform that can definitely achieve a whole lot more than you might have thought. On top of that, it doesn’t give you any kind of ads (because who wants to watch those?) and it lets you download from just about any kind of platform and into just about any kind of file.
CrashPlan is completely free if you're just doing local backups, but even online backups are affordable, with CrashPlan+ accounts starting at $2/mo (per computer) for 10GB of online backup storage, and going up to $4/mo (per computer) for unlimited online backup storage and $9/mo for unlimited online backup storage for a whole household. You can check out their plans here, and try them free for 30 days with a new account.