Sony MSW-A2000 Operation Manual page 149

3
Press the F5 (SET) button.
Formatting is executed.
If you are using a new memory stick, or if an error
occurs during execution of F3: FORMAT STICK, use
the sub mode to format the memory stick.
Note
All data in the memory stick is erased when you
execute F3: FORMAT STICK.
Chapter 13 Setup Utility Menu Functions
13-3