Benefits of Archiving and space saved

Hi All,

  I was looking for some bullet points on benefits of archiving .

  Importantly , is there any statistics on typical %age of storage space saved when we archive a standard SAP FICO system, like 20 % , 30 % ?

  Assuming the current growth of an FICO system is 50 GB per month , if archive is switched on , what shoulkd be the growth rate ?

Thanks,

Chitta