Hey everyone, I've got the answer of my last problem. Now, there is a new big problem! I have looked for much information, and found two companies which mainly match our requirement. Before everything ,I want to know more about their condition for making sure whether they are worth our purchasing. Pls give me more suggestions.Thank u sooo much! (If purchasing source code is too expensive, custom software is also ok.) Choice 1: EASEUS, China---- EASEUS Data Recovery Wizard Choice 2: Stellar, India----Phoenix Windows Data Recovery Note: Basic deleted recovery, formatted partition recovery, and lost partition recovery