1. In the Chatter publisher, click in the Share an Update field to expose the Attachicon.
2. Click the Attach icon to open the Select Files dialog.
3. You have some options for choosing up to 10 files.Select a category to browse its related files (1).Select a content source to browse its related files (2).Search for the file by its file name (3).Click Upload Files, and browse your local drive for files (4).A counter at the bottom of the dialog shows a count of selected files. The Add button shows the current total.
4. Select a category to browse its related files (1).
5. Select a content source to browse its related files (2).
6. Search for the file by its file name (3).
7. Click Upload Files, and browse your local drive for files (4).
8. When you finish your selection, click Add.