Old and new 2 box content loading onto. a32 gig card

[Slamstick]

Gave my old 32 gig converted  2 Box Drumit Mk1 Module (Orange) to my son . I have the newest 2 Box Drumit5 MK2( Black) We took both stock  cards,  his and mine,  and saved the content to his computer which is plenty capable. That was successful!  Then the plan was to get the content of both the original stock cards on 2 separate cards so at the end we both would have all the stock kits from both modules on 2 separate 32 gig cards. One for him and one for me. No matter how we did it,  2 separate folders or all the content in one folder , it either put the content of one of the cards on the new card or the other but not both. What are we doing wrong?