pronouns - "You know more about this than me/I"

Which is correct?

You know more about this than me.

You know more about this than I.

The second sounds unnatural, but I think it is correct because a trailing know is implied.

Answer

My guess is both are correct. The first than is used as a preposition while the second one is used as a conjunction.

Note however, to me, the first sentence means you know more about this than you know about me while the second one means you know more about this than I know about this.