A short guide to what saves and Data.sav are and how to use them all:

The folder with saves is located at the following path: AppData > Local > VotV > Saved > SaveGames
The "AppData" folder is hidden, and to open it, you need to open the "View" tab in Explorer, then click "Options", and in the "View" category at the very bottom, select "Show hidden files, folders, and drives"
A more detailed path: Disk (C:) > Users > (Username) > AppData > Local > VotV > Saved > SaveGames

(Please note that I am writing all miniature guides that do not relate to VotV from the Windows 10 operating system)

Your Data.sav and all saves with worlds are already in the "SaveGames" folder. I recommend creating a file on your desktop at this step and copying all the files from SaveGames there so that you don't lose them

You should unzip the .sav files from my archive into the SaveGames folder. If you want, you can change the save mode, for this you only need to change the first letter before the underscore: "b_Name" (s - plot, i - endless, a - calm, b - sandbox)
If you don't have the sandbox open, but you really need it - in the same folder, replace your Data.sav with the one in the archive (don't forget to make a backup copy). The Data stores all the information about statistics and achievements, and the sandbox opens just after receiving the corresponding achievement

Author: Total Shroomer