SanDisk Extreme 16GB USB 3.0 Flash Drive
Windows 8.1 Pro 64-bit
Used for over 12 months. One day it decided to give me the dreaded “USB device not recognised” error message in the bottom right hand corner of screen. Drive letter missing. Blue light on flash drive is ON.
Connected to every USB port on PC (2.0 and 3.0) - same error message and no drive letter.
Connected my various collection of USB flash drives to any of the USB ports on my PC - result OK working.
Connected Extreme 16GB to another PC - result same error message BUT can see drive letter and see data.
Decided to format and install a fresh copy of Win8.1 alone nothing else. All other HDDs disconnected. Result is same error message and no drive letter.