Execute the following script in Query Editor to move the tempdb files into a new location:
-- Moving tempdb to a new location
-- Checkout current location and logical names
USE tempdb
GO
EXEC sp_helpfile
GO
-- Setup the new location
USE master
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdev, FILENAME = 'E:\sql\db\tempdb\tempdb.mdf')
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = templog, FILENAME = 'E:\sql\db\tempdb\tempdb.ldf')
GO
/*
Messages:
The file "tempdev" has been modified in the system catalog. The new path will be used the next time the database is started.
The file "templog" has been modified in the system catalog. The new path will be used the next time the database is started.
*/
-- Reboot server
-- After reboot, old tempdb files can be deleted