Create Database (edit)

CREATE DATABASE [4126879999] ON PRIMARY ( NAME = N'4126879999', FILENAME = N'F:\\DATA\\4126879999.mdf' ,SIZE = 4096KB , MAXSIZE = 1048576KB, FILEGROWTH = 10%) LOG ON ( NAME = N'4126879999_log', FILENAME = N'G:\\LOG\\4126879999_log.ldf' ,SIZE = 1024KB , MAXSIZE = 524288KB, FILEGROWTH = 10%) COLLATE SQL_Latin1_General_CP1_CI_AS

DROP DATABASE [4126879999];

Data Path & Log Path

select
InstanceDefaultDataPath = serverproperty('InstanceDefaultDataPath'),
InstanceDefaultLogPath = serverproperty('InstanceDefaultLogPath')

declare @DefaultData nvarchar(512)
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultData', @DefaultData output

declare @DefaultLog nvarchar(512)
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultLog', @DefaultLog output

declare @DefaultBackup nvarchar(512)
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'BackupDirectory', @DefaultBackup output

declare @MasterData nvarchar(512)
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer\Parameters', N'SqlArg0', @MasterData output
select @MasterData=substring(@MasterData, 3, 255)
select @MasterData=substring(@MasterData, 1, len(@MasterData) - charindex('\', reverse(@MasterData)))

declare @MasterLog nvarchar(512)
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer\Parameters', N'SqlArg2', @MasterLog output
select @MasterLog=substring(@MasterLog, 3, 255)
select @MasterLog=substring(@MasterLog, 1, len(@MasterLog) - charindex('\', reverse(@MasterLog)))

select
isnull(@DefaultData, @MasterData) DefaultData,
isnull(@DefaultLog, @MasterLog) DefaultLog,
isnull(@DefaultBackup, @MasterLog) DefaultBackup