I would like to have a next-gen console from Microsoft by Christmas because I can't order the series x, I would also buy a series s if you can connect an external drive that works
No.
Yes you can connect an external drive.
However, you will then play with the Xbox One (X) instead of the Xbox Series version.
That means longer loading times, no ray tracing, no Quieck resume and other next-gen features
I think he means a BluRay drive.
I think that's what he meant too.
If you mean an external disc (i.e. BluRay) drive, then that is not yet possible
Although that would be a blatant feature if you could simply connect an external PC BluRay drive. Maybe it'll come after all.
At the beginning of the XBox360 era you first had to buy the special XBox hard drives. There was an update later and you could connect any external hard drive.
So it's not so absurd that it could come.