Hi Tia,
I was planning on using a filing cabinet, I had seen one organized that way, but never got around to getting another cabinet. So, I'm not very original to storing those patterns. I just use cardboard boxes - the type sold at Staples/Office Depot. I have enough that I use one box for children and dolls, another box for the rest. I have considered getting plastic boxes instead, but just haven't even looked. Eager to see what others do.