These file boxes appeared to be of good quality and the price was right. However when I filled them with files and moved them to a storage facility each cracked in some places during the process. The files themselves were not particularly bulky or heavier than those I have put in previous files boxes of this type and transferred in the same manner. I can only surmise that the walls of these boxes were not thick enough or sturdy enough for their intended purpose.
I'm getting ready for a court case and it looks more professional if all of the files are in a sturdy box The drop files fit well in these rather than some other plastic boxes I've had that were a little warped and the drop files didn't slide easily.