AADSync Disk space requirements/recommendations

Hi all,

Does anyone know the disk space requirements for AADSync? Link to AADSync Doco:http://msdn.microsoft.com/en-us/library/azure/dn790204.aspx

From my understanding of the AADSync Doco, SQL Express can support 100,000 objects and limited to 10GB, so from my calculations for 300,000 objects using Full SQL server should not go over 300,000. 

I will be using a remote SQL cluster and synchronizing between 200,000 - 300,000 AD objects. In my development environment I have 170,000 objects synchronized and the DB is around  3.5GB.

If going by the Dirsync documentation the disk requirements recommends 300GB?

Does anyone else have any thoughts on this before I raise this with my Microsoft TAM.

Cheers

Andrew