Timeout issues are one of the most common questions raised in data access development.

To resolve this issue, the common troubleshooting step is increase the php timeout value to a larger value.

If you can't change the timeout value you can:

  1. export the articles without images. You can export the images later via ftp.
  2. export data in bulk. Select 500 articles at a time
    and so on...

With System - Limit 500 plugin you can select 500 items at a time from pagination.