Adding Extra Servers

My Vshare clone site is only 18 days old but already with 800 members and 189 videos. In 18 days the site already used 539GB transfer. The max for my Dedicated with 1and1 is 3000. Seems like i'm gonna be in trouble within 2 months.

My questions are:

What would you recommend?
I have two other servers...should I add them to the vshare server to host some of the videos and will that take some loads off?
When I decide to combine all the files to one server, will it create any problems?

Thanks