With the addition of higher capacity furniture containers limited to specific items, PLEASE let us have larger capacity storage for paper notes.
They really start to add up.
Can't you just put it in a book and then it takes up 1 slot?
You can, but as I learned to my distress if you put a note you didn't write into a book you cannot then remove it from the book. Large paper storage is also more useful for factions that deal with a lot of paperwork that then needs to be shared and available to others, such as the Scribes and the Legion.
The maneuver I do is to stash a message board in a chest called like ARCHIVES. Then, I put all the notes I get in the ARCHIVES and then turn it back into an item I can carry and slap it in the chest.