You can only download Similarity Reports one at a time, there is not a bulk download option. Consider downloading only those Similarity Reports you need to keep as a permanent record such as supporting evidence for a plagiarism panel.

To download a Similarity Report, first access the Turnitin Assignment point by clicking on Course Tools (in the Control Panel) > Turnitin Assignments. Click on the name of the relevant Turnitin Assignment to open the Assignment Inbox. Once this loads, open the submission that you wish to download the Similarity Report for.

Downloading the Similarity Report

Follow Turnitin’s Downloading the Similarity Report guide which provides a short breakdown of the steps needed to activate the Similarity layer and download a PDF of it.