You respondents can upload a file to their questionnaire using the “file upload” question.
The following formats are accepted : png, jpg, jpeg, pdf, odt, doc, csv, zip, bmp or gif.
To insert this question into your survey :
Click on “Advanced question” then “file upload”.
Note : If you want your respondent to upload multiple files, you must add one question per file.
To obtain the attachments, several options are available :