Hi @HMSEdinburge
Indeed it should be ok, here is an example provided using the same board in device mode,
Regarding your second question, when using an 8 MHz HSE, it is mentioned in the datasheet that the USB OTG controller requires a dedicated 48 MHz clock, which is generated by a PLL connected to the HSE oscillator. There is no restriction on the source, as the PLL multipliers can achieve a 48 MHz clock source to feed the USB peripheral.
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