HDFS is a Java-based file system that provides scalable and reliable data storage, and it was designed to span large clusters of commodity servers. HDFS has demonstrated production scalability of up to 200 PB of storage and a single cluster of 4500 servers, supporting close to a billion files and blocks.
SFTP To Go is a fully managed, scalable, durable and highly available file storage service that allows you to securly transfer, share and integrate data with 3rd parties or as an intermediate file storage. SFTP To Go allows you to access your data using several secure protocols such as SFTP, AWS S3 and FTPS.