emqx/changes/ee/feat-11541.en.md

Introduced additional way of file transfer interactions. Now client may send file transfer commands to $file-async/... topic instead of $file/... and receive command execution results as messages to $file-response/{clientId} topic. This simplifies file transfer feature usage in certain cases, for example, when a client uses MQTTv3 or when the broker is behind an MQTT bridge. See the EIP-0021 for more details.