Detach:
SQL Server Management Studio > Databases > Right click the database > Tasks > Detach > check the box "Drop Connections" > OK
Move database with existing permissions.
cd "C:\Program Files\Microsoft SQL Server\Path\To\MSSQL" robocopy /sec .\DATA D:\New\Path
Attach:
SQL Server Management Studio > Databases > Attach > Add > Select the .mdf > OK