For older devices like yours you need everything (apart from old map folders) from internal memomory plus your new map folder. These devices can only boot up & run from one or the other, not both at once.

Try to delete (not reformat) the card, copy across everything (incl your old map folder), insert into the slot & THEN switch on which should boot up off the card & automatically create a new ttgo.bif; once that's sorted then you should be able to replace the cards map folder with the new one, patch the navcore/activate the new map with FastActivate etc & away you go.