This house brand works every bit as well as more expensive brands. I am using one as a swing space for files as I reorganize my file cabinet drawers. Later they will become permanent homes for certain sets of files like choir music that needs to be carried around.
Tried one of these. Seems strong enough - lid was a little flexy and sunk in to box. But it was only by a small amount and kind of expected for this price. Ended up returning as the box itself is kind of small. It holds letter size three tab manila folders inserted into letter size hanging files but that’s it. If you’re using slightly taller red weld files or hanging folders that are even slightly larger than legal letter size either the lid won’t fully close or the hanging folder hit bottom. I have found better option with another brand although a higher price.