Help: Error while inserting data

'C:\Windows\SERVIC~2\NETWOR~1\AppData\Local\Temp\M Y73F7.tmp' (Errcode: 28 - No space left on device)

I'm getting error while inserting data from one table to another. I guess i need to change my.ini file configurations to point it to other destination.
Can you tell me which variable should i change in it ?

Thanks in advance.