How to download a file by WebReport?

You can download files by two ways

1. You can create a WR wrapper and write REST API code to do the download this is probably the easiest and cleaner and frankly you are just using the WR as a HTML wrapper. developer. OpenText.com
2. You can create a WR Tag as explained in this old documentation https://knowledge.opentext.com/knowledge/llisapi.dll?func=ll&objId=76455857&objAction=viewincontainer&ShowReplyEntry=76955421#forum_topic_76955421

Note the above implementation is Oscript s and sometime on cloud solution it may be prohibited to run your custom tags

Without writing code there are OOB ways to download content. Collections Add them to a collection and the use download

For small things zip and download.