It is good practice for users to create a local copy of the central model every day. Creating a new local copy ensures a local copy is always on your hard drive each time you begin modifying a project. 
Tip: For server-based worksharing, the 
  Revit administrator can use the Revit Server Model Creation command line utility to automate the creation of local models. 
To open a model and create a local copy
- Click File tab 
 Open. 
 
- In the Open dialog, navigate to the folder where the central model resides and select it. 
  
To navigate to a central model that is connected to the Revit Server: 
  
 
  - In the Open dialog, in the left pane, select 
		
 (Revit Server Network). 
	  
- Double-click the Revit Server Network folder. 
	 
 
- Select the Revit Server that hosts the central model. 
	 
 
- Select the central model. 
	 
 
 
  This procedure cannot be used for multiple files at one time. 
  
 
 
- Under Worksharing, verify that Create New Local is selected. 
  
Note: If you select Detach from Central, then Create New Local will be cleared. Clear both options to open the central model itself instead of a copy. 
  
 
 
- Click Open. 
 
To create a local copy from an open central model
Use this procedure if you have already opened the central model, and you want to create a local copy of it. 
- Click File tab 
Save As
 (Project). 
 
- In the Save As dialog, navigate to the desired location on the Revit Server network or on your hard drive. 
 
- Enter a name for the file, and click Save.