Sessions & Tracks : DigiBase : Linking and Relinking Files : Choosing When to Relink

Choosing When to Relink
Pro Tools lets you relink files while opening a session or after a session is already open, as follows:
*   
Relinking when opening a session ensures that the session opens with all media playable. Automatic and manual relinking can be performed. See Opening a Session with Missing Files.
*   
Relinking later (after a session is already open) is the fastest way to open the session, but all missing items remain offline and unplayable. When items are needed, go to the Project browser to relink offline items. See Missing Files in an Open Session.
Forcing a Relink
If you cannot relink to the original file, you can force a relink to another file. See Force Relinking Files.