Questions about G-Tech G-RAID with Thunderbolt 3

A WD MyBook Duo is connected to the Thunderbolt behind my G-Tech G-Raid. But it only runs when the G-Tech is on. So the Thunderbolt connection is not looped through. My Macbook Pro M1 (2021) is charged when it is connected to the USB-C, but not to the Thunderbolt. Again, data can only be sent via the Thunderbolt. So either or....

As soon as you operate them in Raid 1, you only see one disk, the other is automatically mirrored. You can also remove one of the two and you should still be able to access the data.

The quality of G-tech is worth the money: The G-raid is my third G-tech drive on the desk and all of them are quite quiet. The fan is very discreet.