Here a daily count of traffic was about 10GB so in month that's 300GB. Let's see how much cloud would cost on Google Drive.

I see 1TB for 10bucks a month so that's a recurring cost for 3 months of capture.

Next you need a rather huge machine to do that original capture so that's for your IT team to implement. Figure a rather high end set of rack computers to capture, store and upload to your Google Drive.

All in all this looks like a 250ish thousand dollar system with high maintenance and staff to implement and run it.