Hard to explain in the title, but I'm planning a migration from SQL Server 2000 databases to SQL Server 2008 R2. The databases are under 100GB total space, but this is only with the Simple recovery model. I'd like to migrate, then change to full recovery model.
So, my question is: how much disk space will I need? Obviously I know there is some amount of opinion here, but what are the common ways of calculating this?