What is the best NEC firmware?
There is no ‘best’ firmware, this is all a matter of opinion. New firmwares (official and unofficial) are released more or less frequently. Do some research and choose a firmware that will best suit your needs. Unless you have a specific reason to do otherwise, you should always use STOCK (official firmware) downloaded from the NEC website In the case of rebadged NEC drives, you should download a STOCK (official firmware) from their site. For an overview of different NEC firmwares including tables of supported media and write speeds, you can check out this thread started and maintained by Liggy.