USB to MMC Class Drive

USB ID 07c4:a004 · Datafab Systems, Inc.

VendorDatafab Systems, Inc.
Vendor ID07c4
Device IDa004
Windows hardware IDUSB\VID_07C4&PID_A004
Linux modaliasusb:v07C4pA004
Linux driverums_datafab

Frequently asked questions

Which device has USB ID 07c4:a004?

USB ID 07c4:a004 is “USB to MMC Class Drive” made by Datafab Systems, Inc. (vendor ID 07c4, device ID a004).

Which Linux driver supports USB to MMC Class Drive?

In Linux kernel 6.12 the device is bound to the driver ums_datafab (source under drivers/usb/storage). The driver is normally loaded automatically when the device is detected.

How do I check whether USB to MMC Class Drive is in my computer?

On Linux, lsusb -d 07c4:a004 shows the device if it is present. On Windows, open Device Manager, then Properties → Details → Hardware Ids; it appears as USB\VID_07C4&PID_A004.

How do I see which driver is currently in use?

lsusb -t prints the device tree with the bound driver (Driver=…) for each interface.

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