Two ways to back up a channel. So one is the way that I do it is to just put all the videos on an external hard drive after I’ve uploaded them to this channel or my other channels and just double my external hard drive. And an external hard drive also backs up to an online backup account I have at backblaze.com, which I love. I’ve tried other ones and they’re absolutely my favorite. Put a link to them in the description below. If you want to use them it’s like $50 for the year for unlimited storage on the cloud. It’s awesome.
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.