Doing an image-based backup of a data drive, about 1.21TB plus another 438GB. Runs every day in the evening, backing up to cloud storage (Backblaze.) The backup of changes varies; looking at last night's log it backed up 6.5GB which took 40 minutes. But then it says it copied 1.51TB 'inside the cloud', which took over 3 hours, then it deleted 1.52TB. I want to understand why it's doing this. I haven't determined yet what this is adding to the billing for the cloud storage but it's higher than it's ever been since I started using Forever Forward Incremental.