I wanted to talk about this as a reverse take from the CD sorting topic, so I figured it's better to necro than repost. I keep my small/medium-ish CD collection within two separate boxes, one up high on my bookshelf and the other on my floor (because my shelf is out of room for it). Originally, when I was getting into VK around 15, I kept my CDs in this emptied, old Christmas chocolates tin. I only had about like 10 CDs total because I didn't have a job yet and therefore no disposable income. All my VK CDs were gifts from my parents or western ones I bought at the record shop for cheap. After I saved up enough money from my job I began buying some because the collector love had been planted in me. After fleshing out my faves selection and my MM collection, that old tin was dangerously overflowing. The CDs even tipped over and hit me on the head one time (My only Rouage CD nearly took my fucking eye out) which made me realize that I had to upgrade. I noticed a nice, big soft box at my work for sale a few days prior so I decided to go with that one. What an upgrade that was, if CDs could talk I bet they'd thank me for taking them out of that cold old tin and into the cozy soft box. My collection grew slowly until quarantine this year, wherein quarantine spending made my collection triple and get too big for the box. So I bought another, less softer one that was smaller, yet managed to fit more CDs in it, somehow. To point where I could just put all my normal CDs in the small box and all my other VK stuff (books) and awkward shaped CDs (collector boxes, 8cms) into the big one.
TL;DR: I put my CDs in a small box on my bookshelf, and my books/collector boxes/8cm singles into a bigger box on the floor.
The small box has officially been filled up, and I've transferred the end line of my collection (for clarification, the "end line" of my collection is as designated by my current sorting status, which can shift from being my western CDs, my Kanji artist-name CDs, etc.) into the big box but I wonder what will happen when I manage to fill it up too... I guess it's another box for me! Though I am thinking about investing in a CD rack at this rate.