HI Dorothy! I had my dad build a couple of units for my papers, to store them horizontally on shelves when I first started scrapping. I still use them! Pictured here:
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I have outgrown that, and now have Cropper Hopper vertical storage units, and I find it more user friendly. see below link
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You can thumb through what you are looking for, without removing the whole stack, making your selection, and having to put it all back on the shelf. I also have a wire cube unit with shelves, that I first used horizontally, and now I use it vertically to store prebought page kits, and other odds and ends. I didnt like storing loose sheets of paper in the wire cube, because the corners would get caught in the openings.
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HTH! Linda