Rules for working with microdata
If the breach involves files, for example files you have transferred, image files on your computer, in your mailbox or similar, you must delete them immediately from your PC, Denmark’s Data Portal, mail folders etc. and inform about this in your email to Research Services.
https://www.dst.dk/en/TilSalg/data-til-forskning/regler-og-datasikkerhed/regler-for-arbejdet-med-mikrodata