Can I copy those two files in a different PC or directory in order to continue to use it? My idea is creating the database in PC A and move those files in a dedicated directory of PC B

Does MS SQL Server Express Edition create the database in a single file like MSAccess?

Any alternative to SQLite? I'm using an MSAccess database which uses a file to stoee all the data. I found SQLite which is using a file as database. The issue with SQLite is the missing way to protect this database with a password. That's why I need something similar to SQLite or MSAccess: does anyone know any alternative? What about firebird? Thanks