In GetAccept, your signed documents are all stored in the Archive on the left side menu. If you would like to download them for an internal audit or for other reasons, you can do so by clicking the Advanced Menu on the right hand side. Make sure to have All selected on the top filter, unless you only want to download your team's or your documents.
If you have less than 100 signed documents, you can simply click Download All Documents. If you have more than 100 documents and you'd like to download them all, will have one extra step. When in your archive, scroll down to the bottom of the document thumbnails and you will see a Show 100 More... button. Click this and 100 more documents will appear.
Do this until you have all of your documents present. You will see the Download Documents option under the Advanced settings update as you show more and more documents. When all the documents are present, you will see it say Download All Documents. Click this and they will all download as a Zip file.