Hi...
You can use File App...
With this app you can share between pc and ipad and also when is in file app you can open with other apps... This app is free
If you need to editing .doc .xls, etc, then you will need docs to go, is a little bit expensive, but it function too with bluethoot... You must to buy for the iPad and in your PC you download an application from the dataviz dot com page, this one is free... Then you install it.. And the app in iPad will give you a code of 4 numbers to sync...
Sent from my iPad using iPF