I use many of these for garage and closet storage I can pack a box full of books and can still manage moving it myself. I also use them for packing full of clothing linens or household goods for donation pickups or drop-offs. They are lighter weight and less expensive than plastic bins and other heavier file boxes. If they get too beat up from use they are cardboard so can be recycled.
Easy to assemble strong enough to last stored for two plus years and inexpensive. No tape needed and easy to label. We used them in our move in 2018 and we are using them again to pack up and move this year.
These boxes were very convenient for moving purposes. They assembled quickly held a reasonable amount of material weight wise and provided bright areas for marking what the contents were inside.
We recently repainted the interior of our home and had 3 floor to ceiling bookcases filled with books that needed to be emptied moved cleaned and refilled. I had some boxes on hand but was so pleased i could run to my local Staples and buy a 10-pack of file boxes to tackle this chore. And after we were done we have a supply of boxes compact and flat to use for future moving and storing records. Boxes are sturdy held heavy loads but were not so large as to be too heavy for us to move.