Export files to relative path in Bridge (Windows)

I want to export some files:

--project

----preview

----psd

this is my folder structure, I want to export my psd files inside the preview folder while the project folder name is changing between different projects:

in MacOS writing "../preview" in "Save to subfolder named" works well

in Windows, it gives to me an error: "Directory creation faild" (i'm using "..\Preview")

how can I resolve this issue?

Thanks!