Hi Diego Alex!

The attachment photo in newsfeed is stored by the system base attachment plugin, you can find it in: ow_system_plugins\base\bol\attachment_service.php

Be careful with what you do in that code, remember that if you update the system, this changes are going to be overwritten.

I don´t know what information do you need or what are you planning to do with it, if you can tell me what you are trying to do, maybe i can tell you how to do it or at least send you to the right direction.

I'm trying to make a complete copy of the original file but i'm not finding his url

In the file "ow_system_plugins\base\bol\attachment_service.php" search for this line:

$image = new UTIL_Image($fileInfo['tmp_name']);

This is where your metadata is lost, you can get and store the metadata if you add your code before that line.

$fileInfo['tmp_name'] is your original uploaded photo, this file is destroyed, so if you need the original file you can make a copy before the "@unlink($fileInfo['tmp_name'])" or just move it instead of unlink it ----- 

move_uploaded_file($fileInfo['tmp_name'], $myNewPath);

Just remember Diego that any code you add to the core will be overwritten on update.  So save your changes :)