@twsh Hi! I'm a data management librarian. It's not specific to humanities, but there's a good rule for storing *any* research data called the 3-2-1 rule.
Basically, keep *3* copies of any important file (primary + 2 backups). Your backups should be on *2* different storage media (e.g. 1 cloud & 1 external hard drive). Lastly, *1* of your backups should be in a different place from you geographically (typically cloud but check) https://bookwitty.social/media/YbyPuUwyCuDtAQwdeT4