: Detailed performance benchmarks from various users are available on the NirSoft USB Speed Test database Hardware Database : View technical details on DeviceHunt Firmware Information
The USB ID pair typically identifies a USB Mass Storage Controller , most commonly found in external hard drive enclosures, SATA-to-USB adapters, or generic card readers. usb device id vid 14cd pid 1212 link
The controller chip is programmed to report a massive capacity to the OS. But physically, there might only be 8GB of cheap, recycled NAND flash inside. When you try to write past 8GB, the data just wraps around and corrupts the beginning of the drive. : Detailed performance benchmarks from various users are