Some USB hard-disk (HDD) models have 00000, shown in place of their serial number in the device instance path. 

You see the above issue only on older builds of Windows 10. For example; versions 1903, and 1909.

This issue can impact FRP configuration as the device instance path information is used when configuring FRP exemptions.

NOTES:

• It’s possible to configure an exemption in FRP, using the serial number to exempt a specific device.
• Prior versions of FRP didn’t offer exemptions using a specific serial number.