I just bought HP SSD P600 and tried to connect it to my Moto Z2 play via supplied USB type A to USB type C adapter . The phone does recognize P600 as a storage drive but the connection is not stable. Sometimes it lasts a few minutes before disconnecting, sometimes it is only seconds. After disconnecting it automatically tries to make connection and then it starts all over again.
Sometimes I see a message "Corrupted JMICRON USB DRIVE" and I'm offered to format the SSD.