Is it possible to add a RBS850 as satellite to Orbi 970?

[Koesbeenian]

I have a X6000 Router RBR850 with 4x AX6000 Satellite RBS850.

If I buy the Orbi 970 3-Pack, would it then be possible to connect the existing 2 AX6000 RBS850 as satellites to the Orbi 970?

At those 2 remote locations where these 2 AX6000 RBS850 satellites are, I don't need the benefits that the Orbi 970 system provides.

[schumaku]

Which Orbi routers and satellites are compatible? ... in my reading and understanding: No.

[Koesbeenian]

That's a bummer. I have my backup server in a shed, separate from my house. Because it's for back-up, speed is not relevant. 1 satellite is solely to get outside, the other one is connected to my server. Maybe I can get rid of the last satellite by adding a wifi dongle to the backup server. Than I still need 4. Concrete and high isolation windows has its pro's and con's.