iDrive and Time Machine backup of photos library
Perhaps this should be posted in a different forum but... As new pictures are added to the "Photos Library.photoslibrary" on my iMac new backups on iDrive or Time Machine need to be made. Does the new backup just involve the newly added pictures or is the entire library re-backedup? Doing the entire large library would be very inefficient and potentially take many hours each time.
Thank you.
iMac 21.5″, macOS 10.15