From: Sharon Olson - The easiest and best method I have found is a file box...one side is for 8 1/2 inch folders and the width is for 12 inch folders. I went to an auto supply store and got some plastic strips, they go on the door edges to protect the paint. I cut these to fit the box and then I use hanging folders. I cut a small piece of the paper and put in the folder tabs. I have two for the smaller paper and they stack with no problem. These boxes can be purchased from Office Depot or any office supply store. The best part they are all on sale right now. Some have lids and this keeps the paper from getting dusty.
From: Nikki - I went to Wal-Mart a year ago and bought the small drawers for my 8 1/2 X 11. I put blues in one drawer and red in one and greens, etc. I have 6 drawer sets; in one drawer I put all my vellum papers and in another drawer I put my Stardust paper. My 12X12 paper I have in one drawer the ones with wheels. I don't have very may of that size.
From Elaine - You probably already do this, but just in case here is a tip for storing large sheets of handmade paper. Buy the multi-layered skirt hangers and hang it over your stamp room door, or in a closet. I bought my hangers from Wal-Mart less than $4.00. The hangers have four sets of spring clips that have rubber grips. The hangers hold many sheets of large sheets of handmade paper, and the rubber grippers keep the papers from slipping off the hangers. They stay neat and you can easily see what you have on hand. No more storage tubes, or crinkled ripped papers from improper storing.
I store mine in 2 Cropper Hopper 12x12 Class Totes (almost ready to get a third one). The outside dimensions of the Class Tote is 17 inches L x 14 inches W x 14 inches H. I think it runs about $50.00 (sometimes you can find them cheaper on eBay or some of the other auction sites) but it does hold alot of paper. I sort mine by solid color in the front (in hanging file folders) and in the back, I have my patterned papers sorted by color also.
I use the 12 x 12 hanging file folders if I have both 8.5x11 and 12x12 papers or just 12 x12 papers for that particular category, if I only have 8.5 x 11 papers, I use standard hanging file folders that I get at the office supply store. My fancy papers are put in with the regular papers. I keep looking for a file cabinet that will hold the 12 x 12 hanging file folders, but haven't found one yet.
They also have specialty hanging file folders to hold other items also. You can check out their website at. BTW, I started with a Cropper Hopper workstation that held two of their smaller Class Totes (they would only hold the 8.5 x 11 papers), but once I started getting the larger papers, I went to the larger Class Tote.