maybe there is no setting in preference for no direction to save the cache files.
check your drive system or delete all render files in preference, clear cache, delete the temp files manually in users/local …
advice: setting in preference to apart cache, footage, project and export files in different drives. maybe you have to copy the footage in these different driver. After that AP you have to redirect footage new.
performance advice https://greenwoodworx-media.blogspot.de/2012/01/performence-und-stabilitat-adobe.html
http://www.greenwoodworx.com
video-production and media-productions, Berlin