Change the Default Location for Projects
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
The default location for files and projects is the SQL Server Management Studio Projects folder in your My Documents folder.
To change the default location for projects
- Change the default location by opening or saving a file or project from another location. Microsoft SQL Server Management Studio stores the location of the previously opened project and uses it for the next opening or saving of a project.