REALLY manage your PDF files. Even upload from your computer direct onto the iPhone across your WiFi. Best is that Leping Li (you gotta love the name) makes it so easy. His goes onto your wireless network and tells you the IP number to type in from your computer and....shazam!! Youre connected to your phone. Upload a file. I LOVE his app!!!
NuWaz about USB & Wi-Fi Flash Drive – Free Document Manager & iFile Explorer App