These boxes are high quality document storage boxes they will easily hold up to the capacity of file folders or loose files but the cover will not accommodate hanging file folders. Because they are cardboard they should not be stacked full more than a few boxes high. Although they are the least expensive option at Staples I think they are overpriced for an branded item. Stickers could be placed over the Staples Name but the large product number is an unwelcome feature. Colors would also be helpful.
We have used these boxes for years for file storage and for moving storage. They are a good size and when used for moving they hold just enough without being too heavy. The built in handles make carrying easier. They are simple to put together and you can fold them flat store them and use again. They are very sturdy.
While the boxes aren't overly sturdy they're much more affordable than most of the alternatives. As long as you're not looking for something super sturdy these are a fairly good buy.