Setting the policy to True makes all types of external storage media (USB flash drives, external hard drives, SD and other memory cards, optical storage) unavailable in the file browser. Setting the policy to False or leaving it unset means users can use external storage on their device.
Note: The policy doesn't affect Google Drive and internal storage. Users can still access files saved in the Downloads folder.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Google\ChromeOS |
| Value Name | ExternalStorageDisabled |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |