Its a convient app for office. Sharing files is important when we work, so its become necessary to build a sharing software. This can improve the efficiency of working. dropbox is a good choice for me. We all use it at office. it is professional and simple to use. After we use it, we know that it is essential. Because it is synchronization, when someone change it and save, you will find quickly. The others can be easy to do what they want. we have decided to use it for our business app.