SBC with only USB and SD Capability

[Hibero]

Does anyone know of a SBC with only USB 2.0 and SD ports. Preferably with Ethernet over USB. If not, does anybody know of a good processor to start with?

[JohnS]

Did you look at Olimex product pages?  Are there none that suit you & if not why not?

John

[qq]

There is https://www.olimex.com/Products/OLinuXino/iMX233/iMX233-OLinuXino-NANO/open-source-hardware. Not spectacularly powerful, but since you didn't elaborate on your specific use case, this seems to meet the minimum requirements that you have named.