In default  , the database is restored to original SQL Server and instance with old database name . If you want to restore to new SQL Server or instance , with new name  ,you can specify here.

SQL Server : The backup agent that is used to restore database .

Instance : The server you want database restore to.

Restore As  : The database you want to restore ,it you want to restore database with a new name  , just enter it in this field  , in this case  , please make sure the directory settings are valid , if you don't change the directory settings , new restored database's files will overwrite the old ones .

Force replace existing database and its related files : Specifies that Microsoft SQL Server should create the specified database and its related files even if another database already exists with the same name. In such a case, the existing database is deleted. Use this option only if you receive a message from Microsoft SQL Server that tells you to use the "With Replace" option.

Keep replication settings : This option should used when setting up replication to work with log shipping. It prevents replication settings from being removed when a database backup or log backup is restored on a warm standby server and the database is recovered. (Available for SQL 2000 or later)

Restrict user access after restore : This option restricts access for the newly restored database to members of the db_owner, dbcreator, or sysadmin roles. (Available for SQL 2000 or later)

Move database files to a new directory : By default, database and log files is restored to its original location, but if you want to restore them to a new location , you can change the location by clicking the "New Location" button , and make sure the directory has been created. The name rule for files recommended by Microsoft is

[ Directory ]+[ Logical Name ] + ".mdf"  for database primary file  ,

[ Directory ]+[ Logical Name ] + ".ndf"  for database user-added files  ,

[ Directory ]+[ Logical Name ] + "_log.ldf"  for log file.