I see it is free at give away of the day. I want to know if it is good. DAYU Disk Master Professional: Virtual disk and backup software and checking hard disk's health software. With it, you can do: The virtual disk utility simulates a real HDD in order to avoid data loss and to facilitate a more comfortable software testing environment. The ramdisk feature allows users to enhance the speed of the PC. Full system protection allows you to easily back up and recover your entire operating system when disaster happens. Fast, easily and safely migrate system to an SSD or a bigger HDD for disk replacement or upgrade. Thanks for the answears.