The image above depicts what you are looking for.
Go down to the basement, interact with any computer and launch the messenger app.
This will start a conversation withHelle.
For this conversation you will gain code 1591 and 350 experience points.
Summary of mission objectives
1.
MANDATORY - Retrieve Helle’s package- The package is in a building in southern Prague(M2,8).
MANDATORY - Find a reader at Future-Past Antiky -The shop is located in northern Prague(M3,11).
The reader can obtained from the store clerk or found in the basement.
The room with the package can be reached in two main ways.
The first option is to choose the main entrance to the building.
Both paths lead to the ventilation shaft.
The second option involves getting to the shutters on the first floor of the building.
In this case, you must start from the street level and make use of e.g.
the Klipspringer Jump Mod.
After you close in on your destination you will notice three other fellows looking for the package.
Note- One of the enemies is carrying a palmtop.
Walk up to the door and wait for Helle to activate the terminal.
Once inside, locate the Memory Disk.
Taking it will give you 750 experience points and allow to have another conversation withHelle.
It is far better, however, to convince the clerk to put down the gun.
Walker will believe in Jensen’s version and hand over the reader (you get 750 experience).
it’s possible for you to then either let him go, or attack him.
An alternative way to get the readeris to examine the store’s basement.
Or you could simply ignore the clerk and launch the door to the basement yourself.
The clerk will soon follow Jensen to the basement, upon which the protagonist will find himself trapped.
You will need to act quickly to keep the main character alive.
Jensen will have to avoid EMP mines and lasers.

Otherwise locate them quickly (you could use Smart Vision) and destroy from a safe distance.
Ignore the corpse and look at the clock hanging near them.
Interacting with it will reveal a button that will unlock a secret room.
Go there and use the terminal on the wall to disarm the bomb attached to Min Wage.
Now you could finally take the reader from the table (and get 750 experience points).
All of the abovementioned optionswill allow you to get the Memory Disk Reader.
Wait until Jensen is once again contacted by Helle.
She will ask the hero to make use of the reader in a safe place, i.e.
Regardless of the advice you give, you will receive 1100 experience points.
This is not the end though, because a group of opponents appears in front of Jensen’s dwelling.
If you want, it’s possible for you to leave a trap for them (e.g.
a frag or gas mine), but you could also hide in one of the adjacent rooms.
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