Multi-session disc has only the last-burnt data, can't see data from older sessions
Cause: This happens when you forget to link the data from previous sessions to the data in the latest sessions. Most CDROMs can’t view the data from older sessions unless they use an application that allows a selection of sessions to view.
Solution: This used to be a problem with older burning applications that simply overlooked this problem. Newer applications default to saving the older sessions, or prompt for user input in this regard. If you are stuck with older software, update to a newer one that supports the sessionsaving feature. Else in the older software, make sure you manually specify that the disc is a multi-session disc and that you want the older session to be saved. Also, applications such as IsoBuster and CD-R diagnostics allow accessing of older data sessions. However, some older CD-ROMs might not be able to work with this software, especially for retrieving older data.