halo 4 campaign 2 disc

hi all sos if this is post is in the wrong section just asking halo 4 2 disc going to start playing soon i only play campaign single so do i need both disc install or the first disc all so going to use the trainer thanks

 

as i use FileZilla FTP Client to send the files to my 360 how do put 2nd disc over thanks

 

i just wont to play solo campaign with trainer thanks

 

big thanks for everyone help