Can i use usb flash disk in Balena Etcher for Flashing?
I dont think beagley ai supports usb flashing. (I may be wrong)
You can use nvme ssd to run boot os on it.
Using a sd card and then switching to ssd is best option.
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I have tried every thing but cant get even UBoot to be recognized on the USB.
I made the USB with bb-imager and its the exact same contents as my SD card, the SD card boots fine, but the USB doers nothing boot wise.
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Something has to load u-boot, and right now that’s only microSD…
Regards,
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The recommended storage capacity of the microSD card is 32GB，64GB is ok？Their prices are very close.
Or use a small microSD and RPI 5 nvme cape with SSD… 
(i have a serial script that easily set’s up a nvme on first bootup, haven’t tried usb with it yet…)
Regards,
Yeah, the bootmode is configured to be uSD with a backup of Ethernet.
Check the TRM SPRUJB3 chapter 5 to see the boot modes. It seems the processor only supports USB device mode booting anyway, so booting from a USB drive is always going to require some other boot source.
Note that the microSD card needs to continue to have a small bootloader on it to enable booting from the SSD. The nice thing is that @RobertCNelson has created a relatively simple process of moving the root file system to an SSD.
The SSD boot process is covered within the NVMe expansion article in the docs.