Product Showcase - Interior

And at the backside, there is a lower compartment holding the PSU, an HDD bay, and nome snazzy cable routing features.

 
The photo turned out a bit too dark, but to the upper right, you can mount two SSDs and you will also find another two mounts for HDDs down below.

At the bottom you can mount the power supply, really any length will fit. There's a handy retention clip here as well. The rest of the space can be used for cable management. You get a good 22cm before you bump into the HDD (which can be repositioned or removed).

There's plenty of space for cable routing TBH, but the most narrow spot I could find is showing just River 2cm of clearance, that's plenty. There's also a nice gutter to lead the cables though as well as velcro ties to manage that routing job nicely.

As stated, the cage holds two HDDs, simply clip them into the brackets and shove them into the bay. Anyone purchasing a 20TB HDD soon, they release in December :)

At the front top side, you can mount two SSDs, but much nice is to do that at the rear side at the motherboard tray location, where again two can be mounted.