In Smartabase, a user can upload an external document such as a PDF, MS Word document and MS Excel file to an event form. By adding this field type to an event form, the user is provided with an option to choose the file they wish to upload from their device or computer.
Once the file has been uploaded successfully, a link is created to enable the download of that document from the record. Note that the user cannot drag and drop files if this single file upload field is added.
If you want a user to be able to add more than one file at at a time and do so using the drag and drop functionality, you can add the multi-file upload field instead.