After a massive archving

Hi,

we will end, few weeks, an important archiving project of our system that is 3TB size. When we end all archving jobs...What should we do to improve performance and save space on our MSSQL DB? We have estimete to delete 700GB data.

It's a MSSQL 2005 box on Win X64, we will update it at last supported release in 2014 before we will upgrade our erp from 6.00 to 6.06.

Thank you.