There are many cases where you need to have a form that accepts files and/or documents. Like say, a CV for a job application form or a school project for an online quiz.
First thing you need to do is login to your MightyForms app.
With the selected form open, click on 'Settings'.
Then click on 'Integrations'. Here is where you'll connect your Google Drive or Dropbox account.
When you click 'Add' you simply have to sign in and allow MightyForms to access your files and folders. Then enable the integration. There are specific tutorials on how to integrate your Google Drive account or your Dropbox account if you want to see more details.
Once you've integrated with one of those Cloud services, go back to your form's dashboard by selecting its title from the breadcrumbs on the left.
Then click on 'Edit' from the options to the right.
To add a File Upload field look to the left corner of the page where your builder toolbox is. Under 'Basic Fields you'll find the File Upload field, select it and drag and drop wherever you want it in your form.
Select the File Upload field once it's in your form and you'll see it's properties on the toolbox.
It will automatically activate the connected account and send the files/documents to the root folder, unless you change it.
Note: if you have both a Google Drive and a Dropbox account integrated, simply select the one you want this particular set of submitted files to be sent to.
Discover more on tips to design your form and its fields.