@Ali34, @iyd, @co2balance I checked this out at my end. Yes, even after successfully downloading the media attachments, you are not able to get the media files safely in the Zip folder. I even got the error message you got.
This is happening as your media file is too large. We are currently working on a new feature that would be able to download the media files in batches so that the system can handle the server time-out limit.
As a workaround, try downloading your media files as outlined in this support article Downloading Photos and Other Media.
I tried in one of your projects @iyd and can confirm that it works perfectly fine.
But please use the Firefox browser for this.
