Check out the App Store...I like "Files"
Check out the app store. I use "Files". It acts like a server. You start the app on your Touch, then go to Finder window, "GO" and "Connect to Server". Window pops up, you enter the server number from the app and then you simply drag items from computer finder window to the Touch. Supposed to work with Windows, haven't tried. The only down side is that it needs a wireless network to work....which may be good or bad.
I open pdf, work, excel all no problem. Best $5 I ever spent.
Of course, there are other options on the store.
R