My point… if I open “iCloud Drive” in Finder, I can see my Documents folder because I have “sync Documents and Desktop” turned on. The contents of Documents ARE backed up. From iCloud.
This is my real bugbear with Backblaze. Whatever they are saying about it being difficult… they are already dealing with it! They also actually said they had worked with Apple on backing up iCloud (presumably that’s how Documents is done) and yet they actually don’t back up most of iCloud Drive at all.
There are no facts at all from Backblaze in this discussion. The only facts I am aware of, from my and some friends’ experience, is that they are selectively coping with iCloud Drive by backing up Documents (and possibly Desktop) when synced, but they do not, for some reason, back up anything else.
So far, it’s not bad communication. It’s disinformation. They have said things that just confuse everyone more than had they kept quiet.
Which is fine because I don’t need it to download the things not on my hard drive.
EDIT
Also, though, I didn’t have that setting checked to “materialize” cloud-only files, but it seems to have snagged them when I verify the download on the website. Weird that it’s working.
"We added the ability to either ignore or “materialize” dataless files to Arq 7.21. Please click on your backup plan (top left), click “Edit” on the right, click on the Options tab, and change the dateless-files behavior to ignore or materialize as you wish.
If you choose “materialize”, Arq opens the file with a flag that tells macOS to tell the “file provider” to make the file data local. Then Arq reads it. Where the file provider stores the data, and how long the file provider keeps the file data around, is up to the file provider.”
According to this Mac OS is supposed to move the file after backup. Have you found where the materialized files are located on your drive, or are you just seeing your drive filling up?
I wonder if marking your iCloud files as “Keep Downloaded” waiting a while then unchecking “Keep Downloaded” would cause iCloud to move the files back?
I just noticed that there is a “Remove Download” option when you right click on a file/folder in iCloud. Using that causes the cloud icon to reappear