#Смотрим где лежат.
SELECT name, physical_name
FROM sys.master_files
WHERE database_id = 2;
#Подставляем свои пути
USE master;
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdev, FILENAME = 'L:\TEMPDB\tempdb.mdf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = templog, FILENAME = 'L:\TEMPDB\templog.ldf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = temp2, FILENAME = 'L:\TEMPDB\tempdb_mssql_2.ndf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = temp3, FILENAME = 'L:\TEMPDB\tempdb_mssql_3.ndf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = temp4, FILENAME = 'L:\TEMPDB\tempdb_mssql_4.ndf');
GO
#Перегружаем службу через cmd
net stop MSSQLSERVER
net start MSSQLSERVER
#mssql #tempdb