Hello @NCCCR_Mike ,
If you're unable to drag-and-drop a CSV/XLS or similar contact file, you're likely running into a connectivity issue. Are you able to click the "or browse your computer" option?
Hi @NCCCR_Mike - Just checking back in. Were you able to get your file upload to work? To clarify in case there were still any issues, you should be able to drag and drop files from the "Add Contacts" flow as long as they are in the following formats: .xls, .xlsx, .vcf, .csv, .txt - During the import it will allow you to specify a list. If trying to drag a file onto a specific list name in the Contacts page that will not work at this time.