De-identifying data

Hello,
I ask respondents to put their name and email so that they can be contacted later for follow up research. However I have been informed by my institutions IRB that I need to have Qualtrics direct names and contact information into a separate data file, that is not connected to the actual survey data to prevent data breach. I'm unsure of how to do this that would provide sufficient anonymity to my respondents. In fact, I'm find with de-identifying each survey from its demographic/user information.

Any guidance on how to facilitate that would be helpful.

Thanks!
Sterlin