MacOS Ventura not making purgeable space available
I have 660 GB of "available" space on my Mac, of which 640 GB is "purgeable". I am trying to transfer a backup using third party software (Backblaze), and it throws an error because it needs 35 GB of space and it can't find it.
Is there any way of manually clearing some of the purgeable space? I know the OS is supposed to remove it automatically when it needs to free up space, but clearly this is not happening in this case. Is it possible to at least find out what is using the purgeable space? Between iCloud and OneDrive I only have <300 GB of files, so there must be something else (Time Machine?). Maybe then I could remove the files through that app and free up space.
I have also contacted Blackblaze because the problem might be on their end, but this does seem like it is a bug in MacOS.
MacBook Pro 16″