Honestly, your question is a little weird. According to your comment, I guess you are a newbie to jetson nano.
Need to clarify something first…
There are two modules sold in the market. One has emmc but no sdcard slot, we call it production module. While another one is totally reversed. And that sdcard only module is sold along with the NV developer kit (devkit).
Thus, there is no “module” that has both emmc and sdcard on it.
However, there are some vendors make their own “carrier board/base board” that has extra sdcard slot on it. But for such case, it is not possible to use sdkmanger to make such board work. Have to use vendor specific BSP to flash the board.
Thus, the above discussion and your latest question are conflicts.
Suppose i have install image in emmc after set recovery mode and i have attached SD card image also.
This “suppose” won’t happen because we don’t have a module that has both emmc and sdcard.
Even if your board is from some vendor and it has a sdcard slot, you cannot use sdkmanager or sdcard image because that extra sdcard slot won’t work with the software from them.