ColdStack supports a lot of clients, that you can use to store your files, backups and personal documents.
ColdStack supports several of the Amazon S3 HTTP API methods. This allows you to use not only ColdStack tools when working with the storage, but also popular tools for working with Amazon S3.
Make sure that your client is configured to download files using only one connection. If you are using CyberDuck then take a look at our CyberDuck manual. If you use another client and still have problems with download then try to contact our support.