SQL Server version error while attaching a mdf file

Question

TITLE: Microsoft SQL Server Management Studio

Attach database failed for Server \'DESKTOP-MR6JCUA\'. (Microsoft.SqlServer.Smo)

ADDITIONAL

Answer 1

Please select Data source as .\sqlexpress intead of (localdb)\MSSQLLocalDB

For example, try to set the Database connection string as

Data Source=.\sqlexpress;AttachDbFilename=C:\\...\\XXX.mdf; Integrated Security=True;