I bought these for moving specifically for books and files. They were cheaply priced so I wasn't even sure whether I'd end up using them or else I expected them to get beat up in the move. I ended up using all of them for packing all kinds of items and now I'm keeping many of them on the shelves for storage.
These boxes are an old standby at our house--they are compact store and stack easily and generally are pretty durable and sturdy (except when they get wet). We use them for anything from actual filing to catch-all boxes that hold anything and everything. I discovered a while back that these make excellent (but expensive) moving boxes--you can stuff them with rocks and they're still compact enough and light enough to be moved by someone who isn't a professional bodybuilder or mover! We frequently store books in them for easy moving and relocation throughout the house and the country! They will show a little wear after a while and they sometimes get squished (especially the lids) which renders them useless particularly when the lids won't go on anymore!
the boxes are excelent value i am using this order for moving but i have also used them for file storage and for xmass hornament storage and storage in general