How did I miss that one? I thought I mentioned to look at the capacity setting in Settings/Storage & Retention/Backup Devices. Since the release of 7.5, I've seen a few systems that have it set to 200GB by default (glitch). It should be a custom size, equal to the actual allocated backup space in the D2D storage (something like 4898GB on an 824, for example). But, I'm glad you found it and got it fixed. Hopefully that will go away in the next updates, but it's been happening fairly regularly for the past few weeks.