If there is one thing you need for keeping clutter at bay is to get these easy to construct cardboard boxes. These are not the most durable and the price reflects that. However because of the easy way to get storage done and especially those that you eventually are going to donate this is a good cost effective way to use these boxes.
Sturdy would buy them again. The boxes are the right size for regular or legal size. Strong handles for moving. Right size for storing & strong enough to stack on each box.
The box is very strong for a basic duty rated box. Good size nice it comes with a top. I think they are worth the sale price. Regular price too pricy for what I need to do.