We're doing some data cleanup here and need to delete all records from the All Subscribers List. I've seen several suggestions regarding exporting all the records from All Subscribers to a CSV, then creating a new List using this CSV, then deleting the List and selecting the option to delete them from the All Subscribers List.
The problem is that we have about 7M+ records in our All Subscribers List, and I cannot get this List to export successfully. It ran for 4 hours and only got to 3% before I killed that process. Any other suggestions for purging all these records?