EC200UCN preload Audio files onto External Flash W25Q64

Hello Team,
I am using EC200UCN module. I have interfaced W25Q64 as an external flash memory to the module as per given Hardware document (Quectel_EC200U_Series_QuecOpen_Reference_Design_V1.1).

I am able to read and write the flash.

Now to the actual question.
I want to preload the External Flash with some Audio file (mostly MP3). I want to know if this can be done using prepack process during build. Following json i have used to preload the UFS section of EC200.

Can this be done for external flash also?

Hello Team
any Solution?