This version of Unity is unsupported.
Method group is Obsolete

WWW.progress

Obsolete Use UnityWebRequest, a fully featured replacement which is more efficient and has additional features. public float progress;

Description

How far has the download progressed (Read Only).

This is a value between zero and one; 0 means nothing is downloaded, 1 means download complete.

progress will remain at 0.0 while sending the request to the server. For monitoring progress when uploading files to a web server, see WWW.uploadProgress.