Can any one say the steps to complete.I first downloaded the sandits import file.then using data loader io i have imported the csv file from then Iam getting very much confuesed.and there is no field called last name in csv file.and which object should i choose to import the file.how many csv files should i create to import.shoul i divide account and contacts in different csv files.

Can any one say the steps to complete.I first downloaded the sandits import file.then using data loader io i have imported the csv file from then Iam getting very much confuesed.and there is no field called last name in csv file.and which object should i choose to import the file.how many csv files should i create to import.shoul i divide account and contacts in different csv files.

Hello all, I am insure where to access this sharing set mapping , could someone point me in the right direction please?
Thanks,
Seth