SiteDirector is unlimited in it's product support.  You can add as many products to the database as you wish.

 

It is recommended that if your store is going to have alot of products that you run on Microsoft SQL Server instead of Microsoft Access.

 

There are just too many possible problems that Microsoft Access can run into that we always recommend the robust Microsoft SQL Server.

 

Most hosting companies offer a Microsoft SQL Server Databas with their hosting plans and it is fairly inexpensive.