iCloud Drive actively syncs individual drawings you choose to store there, while iCloud backup saves a copy of your entire device at scheduled times.
iCloud Drive
- Stores and syncs individual drawings and folders across all your connected Apple devices.
- Allows you to access and edit the same drawing on your iPhone and your iPad.
- Deleting a drawing from iCloud Drive deletes it from all devices.
iCloud Backup
- Saves a complete snapshot of your device's data, including locally stored drawings.
- Does not sync individual files for cross-device access.
- It is used for restoring your entire device if it is lost or replaced. You cannot restore a single app or file from a backup.