no need to remove the policy. go to client where USB full access policy running.
1 Click on client. Help and Support.
2 Troubleshoot.
3 Under Troubleshoot, Export the policy from policy profile.
4 save it at any location with "policy.xml" name
5 copy the file and move on that system.
6 Go to requested system and follow the 1 to 3 steps there also.
7 Under Troubleshoot, Import the policy from policy profile.
8 Select the file path where you have copied it.
After updating th file it auto approve the USB there.
Above step has been implemented successfully from my end.