[portable] Download Microsoft Sql Server Express Edition 2019 Here

: Read and accept the Microsoft Software License Terms to proceed. 3. Configure the Instance

Scroll down to the "Or download a free specialized edition" section. download microsoft sql server express edition 2019

No license cost, ideal for production, development, and redistribution. : Read and accept the Microsoft Software License

Alternative: Use (lighter, cross-platform) which Microsoft now recommends for developers. ideal for production