Windows displays "USB Device Not Recognized" when plugged in. The device shows up in Device Manager as "Unknown Device." The flash drive shows 0 bytes or cannot be accessed. Slow file transfer speeds. How to Find Your Specific Device Vendor
| Feature | Specification | | :--- | :--- | | | Bluetooth 4.0 or 4.1 (BLE) | | USB Interface Purpose | Charging only (not data transfer) | | USB Power Input | 5V DC, ≤ 100 mA | | Battery Type | Non-replaceable internal rechargeable battery | | Audio Output | Built-in piezo buzzer (100+ dB) | | Range | Up to 60 meters (200 feet) line-of-sight | | Compatibility | iOS (Find My app) and Android (Chipolo app) |
The controller has locked the NAND flash memory to protect existing data after detecting too many bad blocks or a physical voltage drop.
: Often uses the CBM2199E or CBM2199S controller chip. Usb Device Id Vid 1e3d Pid 198a
Files can sometimes be copied off the flash drive, but writing new data, deleting files, or running a standard format drops a "The disk is write-protected" or hardware disconnect error.
However, malicious USB devices (like Rubber Ducky or BadUSB) can spoof any VID/PID. To be safe:
The device displays under the "Universal Serial Bus controllers" stack with a yellow triangle marker denoting a Code 10 or Code 43 descriptor layout issue. Step-by-Step Recovery and Repair Protocol Windows displays "USB Device Not Recognized" when plugged in
Unfortunately, I couldn't find any publicly available information about the specific device with VID 1e3d and PID 198a. However, based on the VID and PID, it's likely that the device is a USB-based peripheral, such as a:
If your device is completely dead—meaning no status LEDs illuminate, and the device manager does not refresh or list a VID 1E3D PID 198A item—the controller is likely stuck in an active panic loop. You must force the circuit board into a manual recovery state known as .
| Attribute | Details | | ------------------ | ----------------------------------------------------------------------- | | | 0x198A (6538 decimal) | | Common Device Name | Chipsea USB Composite Device or Chipsea CSU38F20 DFU | | Device Class | 0x00 (Use class information in Interface Descriptors) or 0xFE (Application Specific) | | Typical Mode | Firmware Download / DFU (Device Firmware Upgrade) – or – Custom HID/I2C Bridge | How to Find Your Specific Device Vendor |
⚠️ Flashing the controller completely destroys all data stored on the flash drive memory chips. If you need file recovery, you must use data recovery software before initiating this process.
Flash drives based on the VID 1E3D PID 198A configuration generally fail due to software corruptions rather than physical damage. The core symptoms include:
Right-click the device labeled "USB Mass Storage Device" (with the error). Select .