I have spent the last month working on a copy Development Site, now it is ready to go live. I have imported current User, Order and Products from the working live site.
Is there any way I can transfer Abandoned Carts over? (and is there anything else I have missed?)
Is your development site and production stie on the same version of cs-cart? If so, you should be able to copy the DB tables cscart_user_session_products. Suggest you backup current cscart_user_session_products then copy over from production and see if it gives you what you want.
If you're on different versions then it could get messy. But you can compare the structure of dev/production tables and see if they are different and make appropriate adjustments.