As has been pointed out above, RAID is good for some things but not a complete disaster recovery solution. I definitely agree with @almarg (not unusual) about the time to recover your backed-up data from the cloud. RAID (not RAID 0) is good for recovery from things that don't cause you to lose the whole array. It's not going to help you in case of fire, theft, tornadoes, etc.
A few years back I ran across an article from a company called Backblaze that offers cloud storage services. Because they purchase large numbers of drives, know when they put them in service and (obviously) know when they fail, they are in a good position to comment on the reliability of different brands and sizes. In the article I read, they commented on a high failure rate among 3 TB drives. Because of that I have steered away from buying that size drive. That's probably too general but your data is valuable even if it can be replaced so I don't take the chance. If you're interested you can do an internet search on "backblaze hard drive reliability" and find plenty of references. The most recent one I saw after a short search is here.
Dick
A few years back I ran across an article from a company called Backblaze that offers cloud storage services. Because they purchase large numbers of drives, know when they put them in service and (obviously) know when they fail, they are in a good position to comment on the reliability of different brands and sizes. In the article I read, they commented on a high failure rate among 3 TB drives. Because of that I have steered away from buying that size drive. That's probably too general but your data is valuable even if it can be replaced so I don't take the chance. If you're interested you can do an internet search on "backblaze hard drive reliability" and find plenty of references. The most recent one I saw after a short search is here.
Dick