Steam-New Installation-Old Chars deleted

I got a problem, a long time ago i played GD.
I had a few Char’s and some Unique loot.

Now i want start playing GD again, I need to re-install the Game on Steam.
But where is my Chest and my Characters?
Are there any save files?
or is there any way to Log in with my old Account?

When you reinstall GD it defaults to Cloud Saving now. You should be fine by deactivating Cloud Saving in the GD options (not in Steam).

Ok, i disable Cloud Saving for now.
Because uPnP doesn’t work.
I still got no old Chars&Items . (doen’t matter if they are losed in cloud)

I would start New without any old Chest items
It’s Okay for now, but maybe if I want to replay after a new Computer setup.
Is there my Character for future?-If i disable Cloud Saving for now?

Documents\My Games\Grim Dawn\

Cloud save settings are in two places: Steam client for the game, and within Grim Dawn in the Options. Be sure both are set appropriately.
Just to reiterate what eisp. wrote.