He opened an old forum thread from 2007, its CSS broken and images long gone. A user named KernelPanic had left a single link: cfadisk.inf
You will see a generic placeholder device string. Replace that string by pasting your unique that you copied in Step 1. Save and close the file. Step 3: Bypass Windows Driver Signature Enforcement
: Open Device Manager , right-click your USB drive, go to Properties > Details tab, and select Device Instance Path from the dropdown.
: Usually, you should delete everything after the second backslash in the ID (the unique serial number part). Cfadisk Inf
Re-verify the Hardware ID string structure in Notepad; ensure no spaces were omitted. Windows now locks the drive as a permanent system disk.
Copy the first line of text listed in the Value box (e.g., USBSTOR\DiskSanDisk_Cruzer__________1.00 ). Step 3: Modify the Cfadisk.inf File Open the downloaded cfadisk.inf file using Notepad.
For over a decade, the cfadisk.inf file has been a well-kept secret among Windows enthusiasts and IT professionals. This modest installation file works in tandem with the cfadisk.sys driver—originally a “CompactFlash Filter Driver” developed by Hitachi Global Storage Technologies—and is designed to solve a fundamental issue in Windows: . He opened an old forum thread from 2007,
You must edit the Cfadisk.inf file (usually in Notepad) to include your specific Hardware ID. You replace the existing Hitachi ID with the one you copied from Device Manager. This tells the driver, "Ignore the Hitachi drive; apply these rules to this SanDisk drive instead." 3. Update the Driver
When you "filter" your USB drive through this driver, Windows stops seeing it as a temporary plug-and-play stick and starts seeing it as a standard internal HDD. Why Would You Need It?
While the .inf file is the blueprint, cfadisk.sys is the actual engine. It is the system-level driver that does the heavy lifting, managing I/O requests and changing how the operating system perceives a connected storage device. Together, these two files trick Windows into classifying your SD card or USB flash drive as a "fixed" rather than "removable" disk. Save and close the file
Step-by-Step Guide: How to Configure and Install Cfadisk.inf
Once downloaded, extract the files to an easily accessible location, such as your desktop.
Here is a long guide on the context, usage, and manual installation of such a driver.
[Cfadisk_Devices] %DeviceDesc%=Cfadisk_Inst, GenDisk ; Overrides generic disk
Windows generally doesn’t allow you to put a swap file (virtual memory) on a removable drive. Making it appear "fixed" removes this restriction.