Hi Yuki Aibe,
Instead of downloading you can use scheduled event to trigger Email with attachment.
Mr.Yuta Suzuki gave me the answer, Thank you Suzuki-san. Let me share the suggestions with forum users.
For cloud user
Combine this module with storage service - like AWS S3 - might be the solution to your system. There is S3 connector on Mendix AppStore and you can also use S3 drive softwares for windows - like AirLiveDrive -.
For on-premise user
You can use SMB Connector by fukue-san. https://marketplace.mendix.com/link/component/109624 And you can also use SCP, SFTP connectors available on the AppStore.