The operating system sees the controller but cannot access the memory.
Before attempting to flash new firmware, extract the exact controller model and flash memory layout. Standard Windows properties panels will not show this data.
Apple’s macOS includes native support for USB hubs and mass storage devices bearing 058F:1234. usb device id vid 058f pid 1234 full
: This specific code is permanently assigned to Alcor Micro Corp. , a major Taiwanese semiconductor company specializing in flash memory controllers.
Extremely inexpensive; often given away for free as promotional items. The operating system sees the controller but cannot
Several persistent and frustrating problems are commonly reported on forums and support sites:
Hardware components do not fail without a cause. The three primary reasons for this specific Alcor Micro error include: Apple’s macOS includes native support for USB hubs
If you are a developer or advanced user and need the descriptor dump, here is how:
The device with VID 058F and PID 1234 is a USB Flash Drive made by PQI Corporation. This device is likely a mass storage device, which means it's used for storing and transferring files between computers.
Visit a specialized repository like usbdev.ru to download the appropriate Alcor MP Tool.