No additional software is required. ● Access Dropbox, GoogleDrive,SkyDrive,Box Pocket Briefcase allows you to download and upload files from Dropbox, GoogleDirve,SkyDrive,Box. ● Documents viewer and manager Supports view PDF file, Microsoft Office documents (Word, Excel & Powerpoint), iWorks documents (Keynote, Pages, Numbers), image files(JPG, PNG, GIF, TIFF and others)and other plain text file. ● Media files playback Supports audio(MP3, AAC, Apple Lossless, AIFF, WAV) and video(MOV, MP4, M4V) file playback. ● Share Files With Your Friends Email files directly from Pocket Briefcase. Share files via "Wi-fi Sharing" function. ● Password protection supported Passcode required at App startup Follow @GungyiApp on twitter to get latest news about our products