do i need any software to attach acventureworks 2012 sample database to sql server 2012 installed on my machine

i get following error

TITLE: Microsoft SQL Server Management Studio ------------------------------ Attach database failed for Server 'AYAN-SHAFF-PC'.  (Microsoft.SqlServer.Smo) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1917+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476 ------------------------------ ADDITIONAL INFORMATION: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) ------------------------------ Unable to open the physical file "G:\New folder\AdventureWorks2012_Data.mdf". Operating system error 5: "5(Access is denied.)". (Microsoft SQL Server, Error: 5120) For help, click: htt ...