Warzone 2 DMZ Data Wipe Mission Guide: Building 21 to Zaya Observatory

I still get a little sweaty when I think about Building 21. It is 2026 now, and Warzone has moved through multiple eras, but for completionists the DMZ Crown faction grind remains a badge of honor. Data Wipe is one of those missions that makes you earn your keep. No cap. It is the Tier 5 Story Mission for the Crown faction in the original DMZ run, and it asks me to take the Experiment Hard Drive into Building 21, decrypt it at a computer, then upload the decrypted drive at the Zaya Observatory radio tower in Al Mazrah. If I pull it off, I get the Dead End weapon blueprint and a fat stack of XP. Not too shabby for a day in the exclusion zone.

Why Data Wipe Still Matters in 2026

Let us keep it a hundred: DMZ is not the new hotness anymore. But legacy missions still have a grip on me, and Data Wipe is a proper test of patience, map knowledge, and nerve. Building 21 is the most challenging exclusion zone for Warzone 2 DMZ, a confined space packed with hostile Shadow Company soldiers. Many players put Building 21 on the back burner, but mission grinders know that some Faction Missions force you to go there. Data Wipe is exactly that kind of mission. It was the last available Crown mission in DMZ Season 3, and if you are cleaning up old objectives in 2026, the steps have not changed.

Objective 1: Bring the Experiment Hard Drive into Building 21

To start Data Wipe, I need to infill into Building 21 with the Experiment Hard Drive. If you already completed the Tier 4 Mission Boating and Entering, you might have the hard drive sitting in your mission item stash. If not, you have to go get it. The Experiment Hard Drive is found in the Legendary Supply Cache outside the Ashika Island Bunker. To unlock that cache, I need to flip 9 switches around the Waterways. It is a bit of a scavenger hunt, and it can feel like herding cats if you are doing it solo, but it is doable.

Once I extract the hard drive from Ashika Island, I head into Building 21 with the hard drive and a DRC Building 21 Access Card. Do not forget the access card. I have seen too many players show up at the door like a lost puppy because they forgot the one item that opens the door. Bring the hard drive, bring the card, and you complete the first portion of the mission.

Objective 2: Decrypt the Hard Drive in Building 21

The second objective is to decrypt the hard drive at a computer in Building 21. The area I need is the Server Room, which is located on the basement level. This is the same room required to get the Building 21 Weapon Case, so if you have done that before, you know the vibe. Once I am in the Server Room, I head to the southeast corner of the room. There is a computer terminal right next to some lockers.

I interact with the terminal to begin the decryption process. The wait can feel like forever when you know enemy operators and Shadow Company bots are lurking around. Once the process is done, the second part of the mission is complete. But hold your horses: grab the drive before you progress to extraction. If you leave it behind, you are going to have a bad time. After that, I get out of Building 21 as clean as possible. No need to stick around for a victory lap.

Objective 3: Upload the Decrypted Hard Drive at Zaya Observatory Radio Tower

The third and final portion of Data Wipe tasks me with uploading the now-decrypted hard drive at the Zaya Observatory Radio Tower. If you completed Nowhere To Hide, you should be familiar with this radio tower. It is located on the north side of Zaya Observatory in Al Mazrah. I infill into Al Mazrah with the decrypted hard drive and head over to Zaya Observatory. Once I am there, I head up the radio tower.

At the very top of the tower, there is a computer terminal. I interact with the terminal to begin the upload process. Once the upload is complete, Data Wipe is wrapped up. The reward is the Dead End weapon blueprint, plus a hefty amount of XP. That is a solid return on investment for a mission that had me sweating through two different exclusion zones.

Data Wipe Objectives at a Glance

Objective	Location	What I Do
Bring the Experiment Hard Drive into Building 21	Building 21	Infill with the hard drive and a DRC Building 21 Access Card
Decrypt the hard drive	Building 21 Server Room, basement level, southeast corner	Interact with the computer terminal next to the lockers, then grab the drive
Upload the decrypted hard drive	Zaya Observatory Radio Tower, north side of Zaya Observatory	Climb the tower, interact with the terminal at the very top

Tips for Not Crying in Building 21

• Bring a close-range loadout. Building 21 is tight, so an SMG or shotgun with plenty of plates and stims is your best friend.

• Shadow Company soldiers are no joke. They push, they flank, and they will beam you if you peek the same angle twice.

• The Server Room is a hotspot. Other players may be there for the Weapon Case, so clear corners and listen for footsteps.

• If you are solo, slow down. Use stuns, flashes, and patience. Do not try to be a hero against a full squad.

• After decrypting, exfil quickly. The longer you stay, the more likely you are to run into a sweaty squad or a rat in a corner.

• For the Zaya upload, watch for snipers and campers. The tower is exposed, so smoke, cover, and timing are everything.

• In 2026, DMZ is legacy content, so matchmaking can be hit or miss. Be patient, and maybe bring a friend if you can.

Final Thoughts

Data Wipe is a mission that tests everything DMZ throws at you: preparation, navigation, combat, and extraction discipline. It is not a walk in the park, but it is also not impossible. With the Experiment Hard Drive in hand, a DRC Building 21 Access Card, and a little bit of luck, I can knock out the Server Room decryption and the Zaya Observatory upload in one go. The Dead End blueprint is a nice trophy, and the XP is the cherry on top. Once you finish this one, the next Crown mission on the docket is Abandoned Operator, so keep your gear ready and your head on a swivel. GG, operator.

Data referenced from HowLongToBeat can help frame legacy DMZ grinds like Crown’s Tier 5 “Data Wipe” as a time-and-risk investment: when a mission forces multi-map steps (Ashika setup, Building 21 decryption, then Al Mazrah upload), planning your run order and exfil timing becomes as important as gunskill, especially for completionists trying to minimize failed attempts and repeated infil cycles.