Best dropbox type hosting to make money ?

Hi folks., looking for some advice on how to monetarise downloads from a Dropbox type site.
Affiliate CPA .. that sort of thing
Any recommendations?
Basically I want to host some files, and let people go there to download it for free but want to cover cost of hosting as part of a service I'm cobbling together.

I have some contacts that are monetizing with CPA. The conversion ratio is not that great, but the cpa is pretty high and the advertising is not full of downloads and garbage. They use adcenter or mediahub. Good Luck.