First; that blue dot does not mean you have no access to that folder, it only means there is at least one read only file in the folder.
Second; there is nothing stopping you from making as many folders as you like on your system.
Here's a screen cap of the properties for my downloads folder... Note that it says Read Only... At the moment I took this I had 4 downloads in various states of completion and I saved the cap in there too...
Don't let that blue dot stop you. If the folder was genuinely Read Only, there would be a checkmark in that box.
View attachment 7383