private FolderEntry fillFolderWithLocalData(FolderEntry folderEntry) throws SecurityException {
        //Attach sync info for files
        for (FileEntry file : folderEntry.getFiles()) {
            FileSyncInfo syncInfo = syncInfoProvider.getInfoForFile(file);
            file.attachSyncInfo(syncInfo);
        }

        //Attach local data for sub folders
        for (FolderEntry folder : folderEntry.getFolders()) {
            folder.setLocalFiles(fileCacheProvider.getLocalFiles(folder.getId()));
        }

        //Attach local data to root folder
        List<FileEntry> listToAdd = new ArrayList<>();
        for (FileEntry localEntry : fileCacheProvider.getLocalFiles(folderEntry.getId())) {
            if (!folderEntry.getFiles().contains(localEntry)) {
                listToAdd.add(localEntry);
            }
        }
        folderEntry.getFiles().addAll(0, listToAdd);

        return folderEntry;
    }