The phrase "300mb download" typically refers to highly compressed video files common on piracy websites. Kamasutra 3D (2013) - IMDb
Again, downloading or sharing copyrighted content without permission is illegal. If you're interested in watching Kamasutra 3D, consider renting or buying a legitimate copy from a reputable source.
: Some movies are available for free on platforms like YouTube (official channels or public domain), Vimeo, or through digital libraries in your region.