I buy Staples Economy Storage Boxes by the 10/Pack reqularly. I have prefer this brand over the others because they are very very easily to assemble and strong. I use them in my car for my traveling files to give my briefcases a break. I store old papers and items neatly in my storage areas in the gargage. I also use them in my home office next to the wooden file cabinets. It keeps my papers and books in order. I like the feature the boxes have that are similar to the U-haul boxes having the square area in front of the box to write what's in it is great. I like them and will purchase more in the future.
I have used these boxes for years for storage. They really work because when they are not totally full... they still have the strength in the corners to stack on top of each other...
Cannot beat this product for small business storage needs. Boxes are sturdy and stackable. In addition they are reusable after the files stored are no longer needed and have been shredded. They can easily be used as small moving boxes that are much easier to lift and carry.