I would call both Amazon and Azure to discuss the latest services for moving this data.
From my experience you have two choices:
- Over the wire data transfer using Azure. Azure offers a service called Azure Data Factory which supports moving data from a number of vendors and services into Azure. You will have to pay for gets, puts, data transfer, etc.
- Data Transfer Devices. Both Amazon and Azure support using physical devices to export / import data into their cloud. You would order an export service from Amazon which will be delivered on Snowball. You would then copy the data from Snowball to physical disk drives that you send to Azure for import.
85 TB is not a huge amount of data today (85 PB would be), so the data transfer times will probably be less for over the wire versus export from Amazon, copy data, then import into Azure. Given the real world this will probably take a week for over the wire and a month for export / import. This does not consider the time to actually verify the data was transferred without error. This phase would probably take another week or two.