Are the default maps in the Songs folder? Can you paste what the Songs folder looks like? (like the directory structure).
The "automatically move beatmaps from the Downloads folder" option is part of my troubleshooter. If you open it up it'll be under the General tab. I find it makes it easier to download maps without having to drag it in manually
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There seems to be some issues with dragging beatmaps directly into the Songs folder recently (community/forums/topics/1058335). I'm not sure if its related or not. Instead of dragging them onto the osu! logo you can try dragging them into the osu! window itself (this is a little harder and might take some effort to get it working).
The "automatically move beatmaps from the Downloads folder" option is part of my troubleshooter. If you open it up it'll be under the General tab. I find it makes it easier to download maps without having to drag it in manually

There seems to be some issues with dragging beatmaps directly into the Songs folder recently (community/forums/topics/1058335). I'm not sure if its related or not. Instead of dragging them onto the osu! logo you can try dragging them into the osu! window itself (this is a little harder and might take some effort to get it working).