Box.net is a file storage and synchronization service, which is more suited for buisnesses, indication that it may in some cases replace Sharepoint. (I have not yet tested Box.net)
For LG phones, you have to have Android 2.1 or better.
All you have to do is just install the Box.net Android app from the market, and you will get 50GB free storage and synchronization!
(You will have to create and account when you are logging in.)
Some clever guys over at xda also made a workaround so you can get Box.net even if you don’t have a LG phone. But this method is meant for more xperienced users.