Many industrial devices use port 50021 or 50022 for FTP. Run a full port scan:

Storing high-definition movies, software ISOs, and educational videos for fast local streaming.

Sharing large manuals, software patches, or internal databases that are too big for email.

: Exposing an FTP server directly to a network (with an IP like 10.16.x.x) requires careful consideration of network security measures, such as firewalls and intrusion detection systems.