user/AppData/Roaming/7DaysToDie/Saves folder. (AppData is a hidden folder- enable show hidden)
Navesgame or Random gen then your save game name.
If there are files there-
HubCellData-- this is your map
Region-- stores your map- areas you visited; buildings you built
Player-- stores your character
All the rest files stores some global data like minibike/ electricity chains/ vehicles/ modded files etc.
Let us know what you have in this folder.
*Usually Player data gets deleted but the world is fine. If this is your case use console to get your XP and stats back.
** If the world is corrupted deleting Region data resets your world(blank world) if the CellData is not corrupted(part from Player)
*** If there are no files here- theres nothing much to do- its gone forever(unless you dont turn off your pc and use a 3ed app to retrieve lost data on hdd or from backup)