I'm using nervgh's angular-file-upload, https://github.com/nervgh/angular-file-upload/wiki/Module-API.
Is there a way to use the angular-file-upload and allow additional properties to each file when doing a multi-file upload?
I'm using their image sample to start out with: http://nervgh.github.io/pages/angular-file-upload/examples/image-preview/
Trying to add a boolean to each file that the user can set and then I use that on the server side when it's picked up.
You can use formData property shown in Properties section to send to server whatever you need.
If you're using PHP in server side, I think this post can help you out.