With whatever your venture is, that comes the inevitable amount of products associated with them. If you are a painter, you will have paints, brushes, canvases, easels, and more. If you are a photographer, you will have cameras, lenses, tripod, flash, carrying bags, clothes, and more.
It is not different when it comes to writers. One will need a tablet, laptop, or desktop, printer, printer paper, and in my case, notebooks and pens since I do write by hand the majority of my manuscripts.
I have endless books on writing that I go back to often for research and relearning. At the moment, that covers right now three bookcases. Ugh.
As someone who prints out her manuscripts in various stages, I prefer hard copies to edit, those take-up space which means a file cabinet that is chock full of writing implements, hard drives, thumb drives, and handouts.
It goes on and on.
Some of these are necessary. With any venture comes the avalanche of equipment or accessories you will eventually end up needing.
And while my office is getting filled even though it is a decent size office, it is getting filled up.
But it is a comfy office that when I sit back in my chair and look around find it is the right environment for me to be productive as an author.