When you have a lot to store away and need a handy way of doing it then grab one of these 48L Really Useful Storage Box in Translucent Blue . With the lockable lid you won't have to worry about transporting the box about, as the contents won't fall out, unlike cardboard boxes.
Strong stacking storage boxes
Ideal for storing A4 lever arch files or filing with A4 suspension files
Boxes can withstand temperatures between -15 to 80°C