Green light blinks 7 times

It’s a Kingston data traveler, shouldn’t be that bad

I have some spare 2.5" sata ssds, can them be an option?

Even the better option, of course. And to make it perfect, if the SSD would have its own dedicated PSU.

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just flashed dietpi on a ssd, i get a Firmware not found error on boot

can you share the detailed error message? Maybe you can do a screen shot.

Sorry for the photo, but couldn’t take a screen

Looks like USB boot would need to be in enable first. But this would require to boot of SD card.

That’s kinda strange, I already had enable USB boot, cause recently I was using an usb stick instead of a sd

In this case you should be able to boot of SSD as well. How is the SSD powered? Did you tried different USB ports or another USB cable? Maybe try a powered USB hub.

i’ve double checked boot order, and it’s fine on BOOT_ORDER=0xf41

i’m using this nvme enclosure, i’ve tried both usb 3.0 ports but same result

edit: solved, the ssd must be partitioned in FAT32

Did you flashed a new image directly to your SSD? Usually this should create 2 partition. BootFS using vfat and RootFS using ext4

I’ve formatted the whole drive in FAT32, then flashed the image with Balena Etcher

Usually this is not needed as the whole disk will be overwritten by the image anyhow.