We should have a search feature in Qualtrics Surveys that allows you to find all survey responses that came in via survey preview links, so that they can be deleted all at once. It’s incredibly tedious to go through each survey and look for survey responses that came through the preview link, especially since the Data and Results tab is highly prone to lag when loading or deleting results. 

It would save a lot of time and energy to be able to look up all the preview link responses across all/multiple surveys at once to remove them in one fell swoop.

Thanks!