JMK8 wrote: ↑
Tue May 12, 2020 10:20 am
Tried 3 different cables - no change. Changing the WiFi channel is not really an option. This is very disappointing, perhaps I should raise a bug report?
It isn't a bug. If your USB3 cables are leaking RF interference, then it will cause significant degradation of 2.4GHz wifi performance. It may also be the case that the SSD itself isn't particularly good at shielding the USB3.0 data lines - in which case, an option may be to switch to a powered USB3.0 hub and plug the SSD into that, then locate the hub reasonably far away from the Pi.
Rockets are loud.