If you run a SD project (whether you render stills or videos) and render, you are going to get DV AVI files automatically generated. If it is a HD project, rendering deposits MPEG2.mpg files on your hard drive (whether you render stills or videos). We are talking possibly GB amounts of files if you let them pile up long enough. For Windows 7, 8, or 8.1 64 bit, these preview files are by default in Libraries/Documents/Adobe/Premiere Elements/12.0 and in the Adobe Premiere Elements Preview Files Folder there.
First let us see how much is piled up there before we take action against them.
If the preview files there are part of an existing project or projects, the consequence of deleting those files is that you will have to render again that content in the project to get the best possible preview. If the preview files represent project long since gone, good riddance.
Please check out the situation. And, then we can discuss also pile ups of conformed video and conformed audio files.
thanks for tips on this message and for forum. will give them a try...
Thanks for taking a look at the suggestions and comments.
Major and important....never delete, move, rename folders/files that went into a project after the project has been saved/closed. Otherwise, when you open that project, you will be hit with "Where is the file....?" messages and a disturbing media offline/media reconnect issue.
We can talk about that further. Also, you may want to check out the Project Archiver and its Archive and Copy options.