I store my stamped CDVs in sportscard toploaders for protection and so they can be handed about and examined without worrying about damage (first inserted into archive-quality sleeves so they slide in and out of the toploader easily without damaging the surfaces).
I use the oversized tall 3" x 5" toploaders rather than the normal sports card size, as the tall ones fully protect the CDV and allow room for labeling without fully obscuring the CDV. A number of years ago I purchased a case of clearance/closeout toploaders; they've yellowed somewhat with age, but since the CDVs are inside of archival sleeves, thus putting a barrier between the CDV and the toploader, I'm not concerned about any degredation in the toploader materials over time.
So then how to display them? Sure you can put them in boxes, but that doesn't lend itself to browsing.
Typical 4-up clear binder storage pages for sports cards and postcards end up with pockets that are too large width-wise, and thus the CDVs slide about and are prone to falling out.
Then I discovered these pages, which end up being perfect (regardless of whether you use tall toploaders or regular height, as the width is the relevant dimension here):
https://www.amazon.com/dp/B0949Y46Z...details&th=125 pages for $5.99, 50 for $9.99, or 100 for $16.99. Made of archival polypropylene.
The key is the margin stripe to the left of each column. It not only makes the pockets narrower than the normal 4-up pages, but the extra 2 columns of welds gives the pages more stability.

Here is an image with 4 of my CDV toploaders:
