Jackie Coogan :
I want to change it to a different hard drive... my disk is too small for adobe temp files...
Create a folder named Media Cache on the drive you want to move the cache files to and inside that folder create folders named After Effects and Premiere. Open the Premiere folder and create two more folders - Media Cache and Media Database.
Open Premiere and go to Edit>Preferences>Media
Under the Media Cache section click on Browse and navigate to the D:\Media Cache\Premiere\Media Cache folder and select it - click on Select Folder after you click on it.
Under Media Cache Database select browse and navigate to D:\Media Cache\Premiere\Media Database folder and select it. You will want to move the database to this folder - click on Select Folder after you click on it.
You will also need to open After Effects and select the new media cache location.
The drive letter D:\ was just used an example. Your drive letter may be different.