Export from Version 7 to 6.x?

Hi, i started a seeion with a musician here in Cubase 7. Back home in England he has 6.x (he is not sure if its 6.5). Can Version 6 open Cubase 7-Files? Its jut recorded tracks with no mixing (plugins etc) done yet.

Yes.

Yes but the eq settings may be missing or wrong and the channel strip stuff will be missing.

You should be able to export an archive in C7 and open the (.xml) files in C6.5