Step 2: Set the Trigger
Select the project you want to create from the project list on the left column and click "+Create New".
Select "When a specific app event is received". Choose Slack as the app.


Note: Please select the trigger action "When a file is posted to a channel".
Click "Next" and set up the app trigger API connection.

Set the trigger interval and channel ID from the dropdown as desired.
Conduct a test, and if successful, save it.
Note: You can select the trigger interval from 5, 10, 15, 30, or 60 minutes. The shortest trigger interval varies depending on the plan, so please be aware.

Step 3: Set the Action
Next, set the action.
Click the + button under the app trigger you created earlier and select "Integrate with App".
Select "Slack" as the app.
Set it up as shown in the image below. Be sure to select the action "Download posted file".

For the download link of the file, click "When a file is added" in the output and select "Download Link".
Explanation: By setting it up as above, you can automatically download files posted to the Slack channel.

Conduct a test, and if successful, save it.
Step 4: Set the Action
Click the + button under the app trigger you created earlier and select "Integrate with App".
Select "Box" as the app.
Note: Be sure to select the action "Upload file".

File Name: Set as desired.
Content ID of the storage folder: Click "Download the file" in the output and select "Retrieved File".
Explanation: By setting it up as above, you can automatically reference files added to Slack.
File Attachment Method: As shown in the image below, select "Use Output" and "Retrieved File" from the dropdown.

Well done! This completes the flow of "Upload to box when a file is posted to Slack".