Today , TUAW posted quick review of Briefcase , the latest in a flood of apps for the iPhone that lets you transfer files to and from a PC or Mac and view them on the iPhone . Briefcase is also the only app of this type to allow Wi - Fi file transfer between iPhones . Several competing applications require running special software on the host computer , Briefcase does n't .

Question: Why would one decide to download briefcase ?
Answer: If they need to move files over wi - fi .If they need a running app .If they need to hold items .If they need an app for PC .