[cfadisk_addreg] HKR,,"UpperFilters",0x00010008,"cfadisk"
Click .
Disclaimer: This process requires modifying system drivers. It is highly effective for legacy systems (Windows 7, 8, and early versions of 10), but requires disabling Driver Signature Enforcement on modern 64-bit systems. Step 1: Download the Hitachi Microdrive Driver
Users could not easily run certain software, backup tools, or localized swap files that required a "fixed" target drive.
To make the driver work with your specific USB device, you must manually edit the file to include your device's unique Hardware ID Guide to Mount SD Card as HardDisk - Windows Central Forum Cfadisk Inf
: The driver intercepts the device's hardware ID and reports it to the OS as a fixed disk rather than a removable one. ScienceDirect.com How it is Used Identify Device ID
Go to the tab and select Device Instance Path (or Hardware IDs ) from the dropdown.
The device is identified as Removable Media (USB flash drives, SD cards). Historically, Windows restricted these devices to a single partition to prevent users from losing data if they unplugged the drive prematurely.
What you are running (e.g., Windows 10, Windows 11, 32-bit, or 64-bit) Step 1: Download the Hitachi Microdrive Driver Users
[cfadisk_device.NTamd64] %Microdrive_devdesc% = cfadisk_install,USBSTOR\GenDisk
If you cannot get cfadisk.inf to work (especially on modern 64-bit Windows), use these instead:
When installed for a standard USB flash drive, the Cfadisk driver intercepts the operating system's hardware queries and overwrites the RMB report. It tells Windows that the connected device has an RMB of 0 (Fixed Disk).
is a specialized, legacy driver file designed to bypass this limitation. By modifying this file, users can trick Windows into recognizing a USB drive as a Local Disk (fixed disk), enabling advanced partitioning and enhancing compatibility with certain software. The device is identified as Removable Media (USB
To ensure the health and stability of your computer system, follow these best practices:
Cfadisk Inf is crucial for maintaining a healthy and stable computer system. Without this file, the Windows operating system may not be able to:
Every USB storage device contains a hardware-level flag called the . When you plug a device into a USB port, the Windows operating system queries the device's firmware:
It was originally designed for Windows XP, Vista, and 7. Getting it to work on Windows 10 or 11 requires disabling Driver Signature Enforcement , which can compromise your system's security.
Example : Change USBSTOR\Disk&Ven_SanDisk&Prod_Cruzer\12345&0 to just USBSTOR\Disk&Ven_SanDisk&Prod_Cruzer .
[Cfadisk_AddReg] HKR,,DevLoader,,*ntkern HKR,,NTMPDriver,,cfadisk.sys HKR,"Parameters",,0x00000010 HKR,"Parameters\Device",,0x00000010 HKR,"Parameters\Device",NumberOfPartitions,0x00010001,0 ; The critical "TreatAsFixedDisk" registry entry: HKR,"Parameters\Device",RemovableFlag,0x00010001,0