CMA and Content Question

Is it possible to take content that you put on a DL3 and take it back off to edit. I know you can create an archive but I was wanting to change some of the content that I added on the DL3. I no longer have the original content that I put on so I can not edit that and put it on. So I was wondering if I went into the DL3 through CMA can I take the content from it and put it onto my computer's hard drive to edit and change. Thanks.