Hi Pratik,
the ans to your first question is i have used File Zhila to tranfer files from my local machine to the server.
But once its deployed on the server , i have maintained a logic where in once all the csv files gets load ed then the corressponding CTL files will load the data from only that CSV files which are updated.
To answer your second query , i have maintained only one csv file for each table and my logic is checking the csv file in specific folder and loading the data inside HANA .
thanks,
shweta kapgate