@nifier
Apache NiFi can consume data from many different sources including SFTP and S3 using these processors:
In between those processor you can do many things with that data if you ever choose to do set dynamic attribute for unique destination paths/directories, enhance the data, transform, etc.
Keep in mind that NiFi does not consume and send in a single thread. NiFi must consume the content into its own repositories and then read it from there when writing to the destination. Your described size and volume is not an issue. Your bottle neck if any will be with network and disk I/O depending on your hardware.
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Thank you,
Matt