hi,
many solutions about this issue.
1- backup and restore database on new device (if is on the same server, if not you need transfer users) > after rebuild indexes
2- detach\attach database datafiles on new device (or detach\attach only 1 or more files on new device, look at sql server datafiles managing help ..... sql commands like this 'MODIFY FILE ( NAME = logical_file_name, FILENAME = ' new_path/os_file_name ' )
msdn.microsoft.com/.../bb522469.aspx
3- backup from NAV, create a new DB, restore from NAV Backup > after optimize tables