I have an application that will use much more than 32Kbytes available in ATMega328. Since the application can be divided into few independent modules I am thinking about use an external W25Q32 4Mbytes flash SPI module, like this one: https://www.aliexpress.com/item/32916465920.html to keep everythin…

External W25Q32 SPI memory flash for ATMega328

missdrew November 23, 2021, 1:21pm 2

You can't!
Just buy a chip that has more flash, e.g. atmega2560

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