Thanks for the update, and I'm sorry you're still having problems getting file I/O results. How much space is there in the directory you've specified now? If there's definitely more than 3GB, and you definitely have "Record file I/O performance" checked on the Application Settings dialog when you start profiling, there may be another bug here. Could I get you to contact email@example.com
with details of the application you're trying to profile, and any messages that display above your profiling results when you try to view File I/O data?