When mounting a USB drive in Pyramix, you are asked if you want to enable better performance.
Due to Windows handling on USB drives, write caching is disabled and some real-time operations can be delayed.
Therefore, if you plan to write datas on USB drives, you should enable the Better Performance setting.
In that case you must use the "Safely Remove hardware" feature in Windows, after closing Pyramix before removing your USB drive from the system.
This setting is saved in Windows, so next time you plug the same USB drive on the system, Better Performance setting will be applied automatically.