Custom workflow actions - file upload

Is it possible to upload a file in a custom workflow action?

I followed Accounts Dashboard | HubSpot but setting fieldtype: “file” for input field doesn’t seem to be working

 {
 "typeDefinition": {
 "name": "FileUpload",
 "type": "string",
 "fieldType": "file"
 },
 "supportedValueTypes": ["STATIC_VALUE"],
 "isRequired": false
 }

Hello @IP8, thank you for posting in our Community!

Checking more details, there is no option to upload a CSV file for example through a workflow, there is the possibility to update a Google sheets document, but not to upload it

I would like to invite @remingtonbegg @GeorgeBThomas any recommendations for @IP8?

Thank you,

Pam