Downloading a large zip file and unzipping issues

[EvanAgee]

Hello all,

 

I'm trying to zip up a large site, about 20GB and download the zip file to my local machine. I've managed to get the zip file created on the server and then download the file, however when I try to unzip the file on my Mac via the terminal I get the following message:

 

End-of-central-directory signature not found.  Either this file is not

  a zipfile, or it constitutes one disk of a multi-part archive.  In the

  latter case the central directory and zipfile comment will be found on

  the last disk(s) of this archive.

unzip:  cannot find zipfile directory in one of httpdocs.zip or

        httpdocs.zip.zip, and cannot find httpdocs.zip.ZIP, period.

 

The server is a MediaTemple Nitro server. Any clues what's going on?