dowload and unzip file in NT 8 replay folder Documents\NinjaTrader 8\db\replay
The file will create a folder with the relevant front month and a series of .nrd files inside (one per day)
Make sure to use the "extract here" function as shown, and not the "Extract to" function, to avoid the creation of a folder within a folder.
Note: the archive contains only the dates with the most volume for this contract, meaning, this is data relevant only to when the contract becomes the front month.