Office 365 and use OneDrive, but the problem is all of her photos and videos now take up about 5TB and we only get 1TB per account with OneDrive. She bought some SharePoint subscription to move them over, but it has taken forever to get them all changed over.

I did a search here and saw people recommending BackBlaze and was looking into that. Anyone ever ship their hard drive off to have them do the initial download? If BackBlaze doesn't do that, any idea which places would be able to do that?