import data into sql table from another table using ssis packages

hi... all.

i've created one package using ssis ..

That is used for transferring the data from the tableA to tableB daily at evening..

now my problem is ..

i've huge amount of data i.e upto 2GB of data while transferring for first time

the whole amount data is transferred.. and now i want to transfer only the daily updates

i.e what data i've entered today that much only it should transfer instead of whole data (2GB)..