put files inside of a custom made folder request.setDestinationInExternalPublicDir()

I got this code that loops inside of a FireStore database, gets the URLs stored in there, and downloads it to my phone;

DatabaseReference mDatabaseReff = FirebaseDatabase.getInstance().getReference(placee).child("תמונות").child(year).child(eventcase.getCaseInfo()).child(getmonth1).child(nameGet1+ "-" + idGet1);
mDatabaseReff.addValueEventListener(new ValueEventListener() {

    @Override
    public void onDataChange(@NonNull DataSnapshot snapshot) {
        mStoredPictures = new ArrayList<>();

        if (snapshot.exists()) {

            for (DataSnapshot postSnapShot : snapshot.getChildren()) {

                StoredPicture storedPicture = postSnapShot.getValue(StoredPicture.class);
                mStoredPictures.add(storedPicture);
                storedPicture.getmImageUrl();

                DownloadManager.Request request = new DownloadManager.Request(Uri.parse(storedPicture.getmImageUrl()));
                String title= URLUtil.guessFileName(storedPicture.getmImageUrl(),null,null);
                request.setTitle(nameGet1+ "-" + idGet1);
                request.setDescription("----");
                String cookie=CookieManager.getInstance().getCookie(storedPicture.getmImageUrl());
                request.addRequestHeader("cookie",cookie);
                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,title);
                DownloadManager downloadManager = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);
                downloadManager.enqueue(request);
                Toast.makeText(SearchCase.this, "מוריד תמונות/סרטונים...", Toast.LENGTH_SHORT).show();

            }

        }

    }

the code works but it puts all the files inside of the download folder. I want it to be put it inside a custom-made folder.

I tried to write;

request.setDestinationInExternalPublicDir("/folder/innerFolder",title);

but it just gives me the "Not one of the standard directories:" ERROR.