Some think of DropBox as the network drive for iOS. (Why Apple has neither bought nor Sherlocked DropBox is a mystery to me.)
P. S. I suppose that iCloud now tries to be a cloud-based "network drive" for iOS.
Far afield, but yes, I use various cloud drives with my Android phone. But not what I meant, even my current droid is not as functional as my pocketpc was directly out of the box.
Simple exercise....drag and drop 1GB of music to an iPhone. Simple on a PocketPC, Simple on a Droid...impossible on an iPhone!
[ADDED] I should add that the iPhone was designed to be simple and consistent with the iPod Touch and in that regard it was well executed. It was never intended to be a fully functional
'computer' as the PocketPC was. The old joke was
"If Steve Jobs wanted you to be able to do that, it would have been in there!" Too bad Microsoft was not so forward thinking as to turn the PocketPC into a phone like Apple did and that it took them 3 years too long to figure that out! Full Disclosure I am a former long time holder of MSFT stock and a continuing long time holder of AAPL stock.