How to access a value outside of a promise

Question

I have a value called imgFolder. but I cannot access imgFolder inside getDownloadURL promise. is there a way to access imgFolder inside getDownloadURL(itemRef)... ?

useEffect(() => {
        imgFolderRef.forEach((imgFolder) => {
            const imgRef = ref(storage, imgFolder);
            listAll(imgRef)
            .then((res) => {
                res.items.forEach((itemRef) => {
                    // All the items under listRef.
                    getDownloadURL(itemRef).then(downloadURL => {
                        setImages(oldOne => [...oldOne, { 
                            imgFolder: [downloadURL] 
                        }])
                    })
                });
            })
        })
    }, [imgFolderRef]);