Cloud storage sync is not a backup
iCloud, Google Drive, Dropbox, and OneDrive keep the same files everywhere. That is sync. Home backups need older copies you can restore after a bad delete or ransomware.
#onedrive
2 articles
Sharing files from OneDrive carefully (personal and family)
How to share from personal OneDrive without leaving Anyone links lying around forever: pick the right link type, set expiry and passwords when you can, and clean up old shares.