I use these to store prints and have been quite happy with them:
https://www.mezzi.com/product.php?id=4&prodid=39
They can usually be found for a lot less on eBay.
The only real drawback is that the size (24x36) is a bit small for some prints.
Try one out, I think you will like it.
Mezzi Portfolios
The backing boards and sleeves are "loose". I have boards that are the same as the inside dimensions of the case.hainshead wrote:This is a pretty slick looking folio. It actually upstage my actual poster collection. So do the sleeves just sit loose in here or is there a binding system?