(Optional) Download Files Locally via Terminal

Create a folder on your computer to contain the downloaded files.
Open Terminal, and navigate to the folder you created.
Enter the command aws configure.
When prompted, enter your access key and secret key, as generated in your feed sync.
When prompted, enter your data center region: eu-central-1 or us-east-1, as appropriate.
Upon the next prompt (default output), simply press Enter.
When prompted, paste the link: aws s3 cp s3://com.dynamicyield.feeds/SECTION_ID/productfeed.csv
The files download. You can see them in Terminal, and upon completion, you'll see them in the folder you created in Step 2: Sync the File.