Basic Duty file boxes are a little too 'thin'. Not the easiest to put together...method is fine but thin cardboard makes it a bit difficult...you end up with bends and creases in sides you don't want...separating at perforations often tears the white finish...folding flaps in difficult because of fold crease just off. The price was right but next time I'll spend the difference and go Medium Duty.
We had to move all of the files in our file room. These boxes were a lifesaver. I bought 4 packs of 15 boxes. They are easy to put together and last a long time. I also use them to hold things in my trunk and at home. I've probably bought over 100 in the last few years.