Never mind that these are great boxes for storing files - that's pretty obvious...but I've been using them for years for MOVING. They are great to pack beforehand and store one on top of each other and the handles make them easy to move. And they are not too large to overpack and become too heavy. Yeah it costs more than getting boxes free at the supermarket but they are less than moving boxes at UPS or UHaul and worth the little extra for the payback. And you can always fold them up when you're done and store a bunch to re-use.
I have been using these boxes now for a couple of years. I use them to store all the yearend records in. They have been stacked four to five high. Daily they are exposed to dust from a trailer repair shop. Also they are exposed to the Hot and cold of the shop. The boxes are dusty but the records inside are just fine! I would highly recommend them for storage.