If you have 40 - 500 TB of data that you want to transfer to Azure, you would benefit from using Data Box. For data sizes < 40 TB, use Data Box Disk and for data sizes > 500 TB, sign up for Data Box Heavy.
Data Box is available at a nominal charge for 10 days. When you select the product model while creating an order in the Azure portal, the charges for the device are displayed. Shipping is also free, however, the charges for Azure storage apply. For more information, go to Azure Data Box pricing.