I have tried synching my cards from the computer with the iPhone, but all non of the pictures on the cards can be seen on the phone. When I sync I complete the sync (“media sync log”) and that takes ages (have seen this in other posts as a solution), but I still do it and it still don’t solve the problem!
You have a lot of media, so it may take a while. Please start by ensuring “media sync complete” is shown with the computer version, then visit ankiweb.net and review a problem card. Does it show media there? If not, could you identify a card that has a problem, so I can look into it?