Wait, but the user specifically mentioned "update 104RAR new." I need to make sure that the correct firmware version is 10.4.0, as sometimes NSP files are version-specific. Also, the update might be a patch for the game itself, not the system firmware. Maybe the 104 refers to the game version, requiring firmware 104? I should clarify that if the NSP requires firmware 10.4.0, the Switch must be updated to that version before installing the game.
Another thing is that the RAR file might contain the NSP, which is the installable package. The user would need to extract the RAR to get the NSP file, then use a tool like Tinfoil to install it to the switch. dodonpachi resurrection nspupdate 104rar new
I should also mention that using these methods may brick the console if done incorrectly, so following trusted guides is crucial. Maybe recommend using a USB drive formatted as FAT32 for transferring files due to size limitations. Wait, but the user specifically mentioned "update 104RAR new
I should also consider possible errors: if the user's Switch is on a newer firmware than 10.4.0, the NSP might not install. They might need to roll back their firmware, which is risky and may not be possible, so it's an important point to mention. I should clarify that if the NSP requires firmware 10