You get both units as shown with only One power supply and one dock/usb. They both use the same dock. They are different models for external drives. Just putting them in a lot together.

They both work just don’t need any more.

They were both formatted to ex fat I think. One was originally for Mac. See photos.

You might have to reformat to configure to your needs. Sold as is.

No warranty.

The 4tb exterior has a slightly sticky feel to it. I think it’s from wear/age/heat from operating etc.