I would expect that a pi0 could do it - depends on what sort of performance you want. An of course for a NAS you are better off with an Ethernet port - I would

I would expect that a pi0 could do it - depends on what sort of performance you want. An of course for a NAS you are better off with an Ethernet port - I would recommend a full-size SBC for this reason. But no fundamental reason why a pi0 can't do it. Here's a nice example: https://hackaday.io/project/8688-raspberry-pi-zero-altoid-nas https://hackaday.io/project/8688-raspberry-pi-zero-altoid-na...