Hello John,

The issue you're facing is likely due to a large number of recipients clicking on media file links in your Klaviyo emails simultaneously. The _kx parameter indicates these requests are generated from Klaviyo’s email links, which helps track engagement.

Steps to Address the Issue:

1. Identify the Source:

   • In Klaviyo, go to the campaign or flow that includes the media file link.
   • Check the email’s analytics to identify which email or audience segment triggered the spike in downloads.

2. Mitigate the Load:

   • Host large files on a dedicated content delivery network (CDN) to handle high traffic efficiently.
   • Consider replacing direct file links with a landing page where users can download the file manually or request it via email.

3. Prevent Future Spikes:

   • Add a download limit or implement rate-limiting at the server level to control excessive requests.
   • Use expiring links or token-based access for media files to ensure better control.

If you need help implementing these solutions or setting up preventive measures, feel free to reach out. I would be happy to assist and make the process easy to understand!