I just created a couple of folders in the file explorer and successfully dragged and dropped some pages into them. Then I created another folder, and tried to drag some other pages into them, and nothing happens. I tried doing this with one of the earlier folders, and it still works. I though maybe the issue was the problem folder had the same name as a page (Reading), so I renamed it. No luck. So I deleted that folder and created another called “Library”, and still nothing will drop into it. The one thing I think might be a clue is that the items that would drag into folders are items that I created directly in Obsidian, and those that will not were imported from Roam. Any ideas?
Just found the problem. Obsidian will not let you create a page name with “:” in it, but will let you import names containing an “:” from Roam. As soon as I removed the “:”, the page could be dragged to a folder. It is rather annoying that when it comes to page names, which might be the name of a book, we cannot use some of the actual characters which might appear in the title. Is there no markup symbol that can be paired around a string that says “anything between these symbols is plain text, not markup language”?