Notice!It’s worth knowing that the game simultaneously unlocks the quest namedRannoch: Admiral Koris.
Completing either one of these missions allows to proceed with thePriority: Rannochmain quest.
Neutralizing the geth squadrons can result in gaining experience points and precious war assets.
initiate the galaxy map and travel to thePerseus Veil.
Once you’re there (Tikkunsystem), fly to the planetRannoch.
Listen to a conversation with Legion/Geth VI, because you’ll find out the details of the upcoming assignment.
It’s worth knowing that only Shepard will take part in this mission.
Also,you won’t find yourself in danger at any point of the quest.
Notice that new floor tiles will be appearing automatically in front of you, showing you the available paths.
Make a stop once you’ve noticed red tiles.
You’ll be informed here about a blockade due to aninfected part of the code.
Continue exploring the geth consensus.
Listen to a short transmission from Legion/Geth VI and head forward.
This time you’ll be moving towards a data cluster.
There are two other activities you should perform before focusing on the data cluster.
The first action is to unlock all paths around the cluster.
Unlocking the recordings
You may now focus on disposing of the infected code from the data cluster.
This is performed by locating large groups of orange blocks (screen above).
Each group can be destroyed with a weapon.
Approach the cluster from each side to double-check that you’ve located all infected areas.
The reward for destroying the infected code is a chance to watch the second recording [100 EXP].
Once the recording has been played step into the second access point.
You’ll also receive a warning that the Reaper code has begun to spread.
Stopping the spread of infection
Head forward.
This means you’ll be dealing with an additional complication from now on.
Your objective is to get closer to a new data cluster.
You may proceed towards the final fourth data cluster.
Watch anew recording[100 EXP] and continue the exploration.
Thankfully you won’t have to deal with any complications along the way.
The only thing left to do is to talk go Legion/Geth VI.

I however wouldn’t recommend ignoring the admiral Koris mission completely, you should finish it either way.
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