Access and share external files with 'Files Connect'

1. At the top of the Salesforce window, click the Files tab.
2. In the left column, the External Files list shows available external data sources. Click one to access files it contains.
3. To the left of a file name, click the pop-up menu , and choose one of the following:

• Download downloads the file to your local system.
• Open in target opens the file in the external data source, such as SharePoint.
• Share a copy stores a copy of the external file in Salesforce. If files are shared with a Chatter group, all group members can access the files, even if they lack access to the external system.
• Share a reference point to the external file stored outside Salesforce. No previews will appear in Chatter, and file downloads are available only for users with access to the external system. (Users must enter credentials for the system in the External Authentication Settings section of personal setup). 

1. While authoring a post, click File above the feed, and then click Select a file from Salesforce.
2. In the left column, click the external source, such as SharePoint.
3. Next to the file you want to share, click Attach.

1. While authoring a post, click the attachment icon.
2. On the left column, click the external source, such as SharePoint.
3. Check the file you want to share, then click Add.