Dear Volumionauts:
Booting from USB, although very appealing, has some shortcomings. Depending on USB thumb drive underlying controller or USB SSD hardware there may be no other choice than flashing Volumio OS releases directly. I appreciate that this is not ideal, however problem originates from USB drive handling by Raspberry Pi SBC. We do not stop in our research of this awkward behaviour, however we are still limited by the hardware interoperability. There are few things that you can try by experimenting with settings discussed in subsection 5 of the guide (with no guarantees):
Kind Regards,