Stacking Media Binders

I buy those big dvd binders that hold 250 dvds each.

I’ve been stacking them on top of one another, and was wondering if the weight from the binders could somehow damage the media?

Is it better to stack them vertically?

I’d stack them vertically, just to be on the safe side - my neighbour has several of these, piled on top of each other…those things are heavy once filled! :eek: