youradminfolder/backup_zconfig.php
Code:
// ***********************************************************************
// Set default exclude directories
// ***********************************************************************
$exclude_files = array("".DIR_FS_CATALOG."cache",
"".DIR_FS_CATALOG."extras",
"".DIR_FS_CATALOG."pub"
);
Though you should just delete the extras folder anyway...not needed.
the pub folder is only useful if your selling downloadables, as its the folder the symlink goes in for download waiting for the customer to download. So if your not selling downloadables you can delete the pub folder also.
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