For those who are still playing or are planning to, and don't want to bother with leveling up classes and everything else.

Save for the current version of the game.

Full leveling up to the maximum level in PvP mode.
Full leveling up of classes and all types of weapons to the maximum level in cooperative mode.
Each class has prestige leveled up to the tenth level to receive all passive bonuses.
All documents in all main chapters and add-ons have been collected - they give small bonuses on maps and are required to open special perks of some weapons.
All player portrait frames that were added in the new patch have been opened:

Installation for the Epic Games client:

To install the save, you need to go to the directory at C:\Users\<YOUR USERNAME>\AppData\Local\Saber\WWZ\client\storage, if the display of hidden files and folders is not enabled in the Windows settings - enable it at "Control Panel - Explorer options - View tab" - at the very bottom of the list, check the box for "show hidden files and folders".

Next:

Place the downloaded files user_progression.dat, user_firearms.dat and user_challenges.dat with a replacement in a folder with a bunch of numbers and letters - for me it is 8dda044ba0674c4bb1f29ef6e8c6edb2, you may have a different set of characters.

Installation for the Steam client:

Go to the disk where the Steam client is installed, then follow the path: Steam\userdata\Your_steamID\699130\remote and place the downloaded file user_progression.cfg , user_firearms.cfg and user_challenges.cfg with a replacement in this folder.

To prevent something from going wrong - do not forget to make backups of your files just in case.

If you suddenly have questions like:

I do not have all character/weapon skins open and some equipment is unavailable.
         Equipment, character and weapon skins from paid add-ons are tied to the account and cannot be opened by transferring the save. You will have to buy them yourself.
The currency in the upper right corner is 999999, is this cheats?
         No, this is the result of my extremely frequent pastime in the game since the release in 2019.
It doesn't work for me on a pirated version.
        Find out on the rapak page where the configuration and save files are stored in this version of the game. I don't know myself and don't plan to figure it out.

Author: Slipnot6