To locate...go to your Google Drive
 (note the drive icon may be in a different position on your computer)...
Click on shared drives...then NEPA-Ad-Archive.
Ads are organized in folders by their ad numbers.
Simply do a search to find the zip.
Note: only the last 13 months are saved. If the file is not there you will need to send an old PDF or screenshot and ask for the ad to be rebuilt as close as possible.