An SDF file is a SQL CE (Compact Edition) Database file. The error you posted is referring to SQL Express, which is a different Database Engine that uses MDF files.
You can convert your CE/SDF file to Express/MDF by following this post…
An SDF file is a SQL CE (Compact Edition) Database file. The error you posted is referring to SQL Express, which is a different Database Engine that uses MDF files.
You can convert your CE/SDF file to Express/MDF by following this post…