For the technically inclined, FA00 and especially FA04 can be physical.
The firmware stored on the controller (or in a reserved area of the NAND) has become corrupt. This can happen due to: alcor micro unknown fa00 f w fa04
Let’s break the keyword down piece by piece. For the technically inclined, FA00 and especially FA04
In summary: The keyword describes a USB storage device with an Alcor Micro controller whose firmware has failed or is inaccessible, causing Windows to label it as an unknown device with error status FA00/FA04. In summary: The keyword describes a USB storage