Understanding the USB Device VID 058F PID 1234 If you have discovered the identifier VID 058F PID 1234 in your Device Manager, you are likely looking at a generic USB flash drive built with an Alcor Micro Corp. controller. This specific combination is one of the most common signatures for mass-produced, "no-name" thumb drives and is frequently associated with firmware issues like the "No Media" or "0 MB Capacity" errors. What is VID 058F PID 1234?
Every USB device has a Vendor ID (VID) and a Product ID (PID) to help the operating system identify it.
Vendor ID (058F): Assigned to Alcor Micro Corp., a major manufacturer of USB controller chips.
Product ID (1234): A generic product ID often used by Alcor Micro for mass storage devices or flash drives.
This ID often appears when a drive is in a "test" or "generic" state, or when the firmware has become corrupted, causing the computer to see the controller chip but not the actual memory storage. Common Issues and Symptoms Devices with this ID often exhibit the following problems: usb device id vid 058f pid 1234 full
"No Media" Error: The drive is detected as a letter (e.g., G:) but shows "0 bytes" of space and cannot be opened.
Write Protection: You can see your files but cannot delete or add new ones.
Generic Name: The device appears as "Generic USB Flash Disk" or "USB Mass Storage Device" rather than a brand name like Kingston or SanDisk. How to Fix a Malfunctioning VID 058F PID 1234 Drive
If your drive is showing "0 MB" or "No Media," standard formatting usually won't work. You likely need a Production Tool (MPTool) specifically designed for Alcor Micro controllers. Understanding the USB Device VID 058F PID 1234
Identify the Controller: Use a tool like ChipGenius to find the specific "Controller Part-Number" (e.g., AU6989SN, AU6986).
Download the MPTool: Search for the Alcor Micro "MPTool" or "AlcorMP" version that matches your controller number on specialized sites like USBDev.ru or FlashBoot.ru.
Reflash the Firmware: Run the tool to "Low-Level Format" or reflash the drive. Warning: This will permanently erase all data on the device. Quick Troubleshooting Tips
Before attempting a high-risk firmware flash, try these standard Windows fixes: How to Install/Reinstall the Driver Technical Overview: USB
Standard USB Identifiers - Windows drivers - Microsoft Learn
VID_058F&PID_1234The combination of Vendor ID (VID) 058F and Product ID (PID) 1234 identifies a specific class of USB hardware. Based on the USB Implementers Forum (USB-IF) assigned identifiers, this entry corresponds to hardware manufactured by Alcor Micro Corp.
VID_058F PID_1234 is an Alcor Micro generic USB mass storage controller — typically a basic card reader or a suspect low-end/counterfeit flash drive. The term full likely denotes USB Full-Speed (12 Mbps) operation or a complete driver identifier. While functional for simple data transfer, this device ID is a red flag for performance issues or capacity fraud.
The USB Vendor ID (VID) 058f and Product ID (PID) 1234 correspond to a generic, low-cost USB flash drive controller commonly found in unbranded or promotional USB drives.
Older laptops may have handshake issues with the internal USB hub. A BIOS update can include new USB module firmware.
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