windows-itpro-docs/windows/client-management/mdm/policy-csp-filesystem.md
2025-05-05 09:39:58 -06:00

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FileSystem Policy CSP Learn more about the FileSystem Area in Policy CSP. 04/30/2025 generated-reference

Policy CSP - FileSystem

[!INCLUDE ADMX-backed CSP tip]

[!INCLUDE Windows Insider tip]

ClfsAuthenticationChecking

Scope Editions Applicable OS
Device
User
Pro
Enterprise
Education
IoT Enterprise / IoT Enterprise LTSC
Windows Insider Preview
./Device/Vendor/MSFT/Policy/Config/FileSystem/ClfsAuthenticationChecking

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

[!INCLUDE ADMX-backed policy note]

ADMX mapping:

Name Value
Name ClfsAuthenticationChecking
ADMX File Name FileSys.admx

DevDriveAttachPolicy

Scope Editions Applicable OS
Device
User
Pro
Enterprise
Education
IoT Enterprise / IoT Enterprise LTSC
Windows 11, version 22H2 [10.0.22621.2338] and later
Windows Insider Preview
./Device/Vendor/MSFT/Policy/Config/FileSystem/DevDriveAttachPolicy

Dev drive is a drive optimized for performance considering developer scenarios and by default no file system filters are attached to it. Filters listed in this setting will be allowed to attach even on a dev drive.

A reboot is required for this setting to take effect.

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

[!INCLUDE ADMX-backed policy note]

ADMX mapping:

Name Value
Name DevDriveAttachPolicy
Friendly Name Dev drive filter attach policy
Location Computer Configuration
Path System > Filesystem
Registry Key Name System\CurrentControlSet\Policies
ADMX File Name filtermanager.admx

EnableDevDrive

Scope Editions Applicable OS
Device
User
Pro
Enterprise
Education
IoT Enterprise / IoT Enterprise LTSC
Windows 11, version 22H2 [10.0.22621.2338] and later
Windows Insider Preview
./Device/Vendor/MSFT/Policy/Config/FileSystem/EnableDevDrive

Dev drive or developer volume is a volume optimized for performance of developer scenarios. A developer volume allows an administrator to choose file system filters that are attached on the volume.

Disabling this setting will disallow creation of new developer volumes, existing developer volumes will mount as regular volumes.

If this setting isn't configured the default policy is to enable developer volumes while allowing antivirus filter to attach on a deveveloper volume. Further, if not configured, a local administrator can choose to not have antivirus filter attached to a developer volume.

A reboot is required for this setting to take effect.

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

[!INCLUDE ADMX-backed policy note]

ADMX mapping:

Name Value
Name EnableDevDrive
Friendly Name Enable dev drive
Location Computer Configuration
Path System > Filesystem
Registry Key Name System\CurrentControlSet\Policies
Registry Value Name FsEnableDevDrive
ADMX File Name refs.admx

Policy configuration service provider