I'm confused about why you want to move your daffodils to a larger pot. They won't spread out into the larger pot and you will not be able to separate them and spread them out. But if you really want to... Slip the hole root ball out of the smaller pot without disturbing the roots and plant it into the bigger pot - keep the soil level the same. If all goes according to plan, the bulbs will not notice they have been moved.
If you want to do this again next year, buy a bag of bulbs in the fall and plant them in the larger pot in the fall. It will be a lot cheaper in the long run.