Hi, thanks for reply.
I use nrfutil for both App core and Network core programming (nrfjprog is officially deprecated). Because of I use also an external QSPI flash, that can be memory apped, what I'm looking for is a way to read and write this flash directly by JLink programmed, as I do whit other projects with uC whit memory mapped external flash (ST or NXP).
Thanks for help