Fortnite Client Settings Editor is one of the two things that can be used to import your settings from the cloud of Epic Games. In order to import the settings from the cloud of Epic Game using the Client Settings Editor, the first thing that you have to do is to click File and then Import. Then, log into your Epic Games account. The next thing that you have to do is to open ClientSettings.sav. After that, copy your MouseSensitivityX and Y into the FPS Aim Trainer with the dropdown set to Fortnite Config. In the end, the numbers you pull should be pretty close to 1/4th what you see in the options menus of Fortnite.
There might be a case when you change the sensitivity and try to put it into Kovaak’s you get an error popped up saying that it is failed to deserialize file with the exception unable to read beyond the end of the stream. If you face this kind of issue, you can use newest Client Settings Editor. For your information, the newest version of Client Settings Editor is called Client Settings Editor v1.5. this one is updated to support compressed ClientSettings.sav files from Fortnite v10.30+. It is added for SetProperty type. For more information about it, feel free to visit a site named GitHub.
Aside from using Fortnite Client Settings Editor to import the settings from the cloud of Epic Games, another option is to see a script made by Kovaak and Struth. Both of them put together the excellent video showing how to picture the Fortnite sensibility using the sensitivity matcher script. Please take a note that this option uses Fortnite Slider.
For those who do not want to use the script, you are able to directly copy the sensitivity numbers from Fortnite and use the Fortnite Slider dropdown menu. Please be aware that the in game options menu of Fortnite rounds the sensitivity and hides a bit of precision, so it might be off by a few tenths of a centimeter per 360◦.
If you want to use the Mouse Targeting Sensitivity or ADS value, you need to play the scenario that has ADS enabled. Before anything, you need to know that not every scenario or weapon allows you to ADS and this is by design. To open up the scenario that allows you ADS, please check out Ascended Tracking v3 or Tile Frenzy Mini or PatTargetSwitch, and then head to Game Options. The next thing that you have to do is to click Weapons and click ADSable Hitscan Cone or whatever weapon is on the hotbar. After that, please uncheck the thing called Zoom Sens Auto Scale and raw the sensitivity multiplier. When you are done, the last thing that you need to do is to paste the Mouse Targeting Sensitivity value into that field. Please take a note that this is a per-weapon option, so you will have to set it for any weapon you ADS with.