I have strange issue, that every time I play this game, there are appearing strange folders in the GOG Galaxy\Games\The Witcher 3 Wild Hunt GOTY\bin folder. Those folders have a strange names like "¬6 Ăö"
The new folder like this is created automatically when I load the saved game.
The strange thing is, that game has much more FPS when I delete all those folders before I will run it.

Can anyone tell me what this folders are?
And why game runs much faster when I delete them?

I have the exact same thing. No idea what it is. Tried googling it, but this thread here appears to be the only relevant result.
When I saw it, the first thing I thought was my SSD failing. But it seems everything's okay. Either the game or the launcher creates it.