After tedious searching, I found out that these files are being generated by Acronis Active Protection. The path to these files begins with C:\System Volume Information\FileProtector\FileStorage and within that directory are subfolders containing thousands of subfolders, each containing thousands more, each containing ONE file called "ContentFile.BLOB."
I looked at the Properties of the "FileProtector" folder. After 3 hours it is still counting bytes, files and folders. So far:
I'm just going to leave it running all night to see what the final size of this folder is. I believe it is at least 14 GB and possibly a great deal more.
SO I turned off Active Protection and wanted to free up all this space. BUT I can't delete any of the files.
I've changed the permissions on a single BLOB file to include delete permission - won't delete. I've changed the 4th level files so nothing is read only - still won't delete. And I don't get any message as to why the files/folders won't delete. I get the normal, "Are you sure you want to delete [filename]?", I click Yes, and the file just stays there, still highlighted.
I need the disk space. How the heck do I get rid of all this material?