Originally posted by Yakumo_2020:

the devs moved the files around the H&H update so there is a bit of confusion as to where everything is,

try checking

C:/users/<yourusername>/AppData/LocalLow/IronGate/Valheim/

there should be two folders under that, worlds and characters.

one thing of note, I use Linux so the slashs are going to be reversed on a Windows system and I'n not 100% sure thats where you'll find the files on a Windows system but hopefully its a start.

good luck

Yep, I can conform that in windows your saves are located in
C:\Users\<yourusername>\AppData\LocalLow\IronGate\Valheim\

P.S. If you click on the magnifying glass in the bottom left (on windows 10) and type %locallow% and press enter an explorer window should open at that location.

<edited for the P.S.>
Good Luck!