What is the FASTEST way transfer the data?
Upload the data to the S3 bucket using the existing DX link.
Send the data to AWS using the AWS Import/Export service.
Upload the data using an 80 TB AWS Snowball device.
Upload the data to the S3 bucket using S3 Transfer Acceleration.
Explanations:
The 500 Mbps Direct Connect link is too slow to transfer 20 TB of data quickly. At best, this would take several days.
AWS Import/Export service is deprecated and no longer available for transferring data.
An 80 TB AWS Snowball device is too large for the 20 TB of data to be transferred. While it could transfer the data quickly, it’s overkill for the size of the transfer.
S3 Transfer Acceleration uses a globally distributed network of edge locations to speed up uploads. With a 1 Gbps ISP link, this method will transfer the data much faster than other options.
From what I’ve seen, the answer is:
Upload the data to the S3 bucket using S3 Transfer Acceleration.