Recently, I have been getting iCloud error messages saying that I don't have enough local storage to keep full copies of my Photos library, despite having well over 200 GB showing free on my startup disk (a 1.15 TB BYO Fusion drive) according to the About This Mac storage window. I then noticed that when looking in Disk Utility and when doing a Get Info on the disk in Finder, that there was significantly less space showing on the disk, and it seems to be shrinking for no apparent reason. Last night, I was having issues upon reboot as well...with the Finder and all startup items seemingly freezing up. I noticed once I was able to get to the desktop that Spotlight seemed to be re-indexing, so I added my startup drive to be excluded in Spotlight prefs, thinking that maybe the Spotlight database had ballooned out of control, causing the drive space to shrink and the slowdowns that I experienced. But so far, that space isn't reclaimed, so I wonder if there is something else that's filling up my drive in the background. Any ideas? Any help is greatly appreciated!