I have been using these boxes for years. All my archived files are in these boxes which makes it easier for storage and stacking. They arrive flat and are easy to store until they are ready to be used. They are easy to assemble and hold up well for the storage of paper files. Most of the boxes are completely full of paper and weigh quite a bit. They have a preprinted area to write the dates and a description of what is in the box. We have sent boxes to an offsite records retention facility for long term storage and they were acceptable to the company we use.
Bought them for putting files and paperwork away in long term storage. I also tend to use a couple of them to put all of my paper recycling in so I can take it to the kids schools for recycling. They hold up well even using them for that purpose. But if I needed ones that are going to be used for files and papers that will be used on a regular basis though then I would get the ones that are heavy duty. They are also stackable. Though I wouldn't recommend stacking them over 2 high if you have a lot of paperwork in them.
We use these boxes as a regular to file and store our information from previous periods and work files. They stand up to the hauling and years of storage in our file room. We are able to stack them on top of each without any issues.
The Staples Economy Boxes are great. They come in a ten-pack for a reasonable cost and are more than worth the money. I purchased a number of these for moving books. The boxes have handles built into the walls and stack easily. To assemble you need to disconnect the lid at the perforation and fold the corners in. Then separate the flaps at the perforations and fold the bottom in before the sides. If done incorrectly the bottom flap will hang down make sure you follow the directions. Once complete the boxes are ready to be filled. While they are designed for files (hence the name bankers boxes) the work great for stacking and storing all kinds of things. I highly recommend these.