Creating DS(Data Source)

Hi

Please correct me if I am wrong.

2 types of CSV files in a year e.g. 12 CSV of Type A & 12 CSV of Type B

1st I need to create 2 DS (Master Data Attr.) for Type A & B for loading Jan.'s CSVs.

2nd I need to create 2 DS (Transaction Data) for Type A & B for loading Feb. to Dec.'s CSVs.

Thanks