Just tried using a couple of USB card adapters with my 8GB Pi4.
Both cause immediate loss of USB hard disk access. Unplugging
the offending adapter does not restore normal operation. Power
cycling puts matters right without apparent ill effect.

Doesn't seem to matter if there's a card in the adapter or not.

The USB3-Sata adapter is a Sabrent EC-UASP. It uses the UAS
driver and hasn't caused any obvious problems on its own.

Anybody seen this, or have any idea what's going on? The card
adapters are fairly generic. Both are USB3, both have been used
before, but only in USB2 ports on Pi3's. One is no-name large-
and micro-SD only, the other is a UGreen card reader supporting TF,
SD, CF and MS cards. The slot labeled TF is the one I used with
microSD cards, didn't notice the "TF" marking till just now.

Thanks for reading!

bob prohaska

--- SoupGate-Win32 v1.05