Seeing VID FFFF often means the controller is in "boot-loader" or "test" mode. The original firmware is likely missing or corrupted, making the drive prone to sudden data loss or "disappearing" from your computer.
is a generic "filler" ID, often associated with unbranded or Taiwan OEM chips.
. Devices with these IDs often appear in system logs as "NAND USB2DISK" or "Taiwan OEM" and frequently utilize (e.g., FC1178/FC1179) controllers. Critical Assessment: The "Patched" Status