Treat external storage devices as read-only

Setting the policy to True prevents users from writing to external storage devices.

Unless external storage is blocked, if you set ExternalStorageReadOnly to False or leave it unset, users can create and modify files of physically writable, external storage devices. (You can block external storage by setting ExternalStorageDisable to True.)

Supported on: At least Microsoft Windows 7 or Windows Server 2008 family

Registry PathSoftware\Policies\Google\ChromeOS
Value NameExternalStorageReadOnly
Enabled Value1
Disabled Value0


Administrative Templates (Computers)

Administrative Templates (Users)