I have purchased a CD holder from Walmart that holds I believe 120 CDs. There are four CD openings per page. Which is perfect when you have all 4 sets of circles, etc. as you can see them all at once. The case also zips closed and has a carry handle on the side. It's a perfect storage solution.
I then purchased from Dollarama magnetic sheets ($1 a piece) that are called Photo-Magnets which is in the photo album, picture frame section. I then cut them to fit inside the CD pocket and place my nestabilities, marianne dies, etc. on the page.