The NDS has a bearing preload which probably just needs adjusting. You will need 2x 19mm spanners, at least one needs to be thin to get on to the preload nut but a normal one will do the outer ss locking nut. Adjusts just like cup n cone but you may need the 12mm allen key to stop the whole axle turning when trying to tighten up the ss locknut as that will just unscrew the preload. 3 hands needed, although i managed it with 2 after a lot of swearing🤣.
They are a bit fidgety to get right but simple enough once you have done it a few times.
ETA: Forgot, yes there are cartridge bearings in the hub. Remove both NDS nuts from the axle and pull the freehub and axle out from the freehub side. The 17mm nut on the freehub side is just for removing freehub from the axle and is left hand thread, no need to remove this nut unless changing the freehub.