Title says it. I have just shy of 1.2K discs that I have digitized for my media server, but I'd like to keep the originals in case I discover an error in digitization or server failure. I currently have four 3d printed spindles that hold around 300 each but they're uncovered and the design doesn't allow for a cover. Is anyone aware of either retail spindles that have covers that I can buy without having to buy a bunch of blank discs that I'd just throw out in a 300ish capacity, or some other space efficient storage system? I don't anticipate the need to access them any time soon, hence the spindles.
I have avoided books because they are so space inefficient, I can fit twice the amount of discs in spindles that I can in the same space of books. Are there other methods that I haven't even considered?