Error 0x80310078

Value: -2144272264 | 0x80310078 | 2150695032

What does it mean ?

FVE_E_POLICY_USER_ENABLE_RDV_NOT_ALLOWED  
Group Policy settings do not permit you to turn on BitLocker Drive Encryption on removable data drives. Please contact your system administrator if you need to turn on BitLocker.
Value: 120 | 0x0078 | 0b0000000001111000

Where does it come from ?

FACILITY_FVE  
Full volume encryption
Value: 49 | 0x031 | 0b00110001

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