Transmission 3 (via Entware) on Nas326 downloaded files permission issue

Hi, I'm trying to keep my old NAS326 updated, I successfully installed transmission 3 through Entware repository and it run pretty well, the only issue is the downloaded files permissions which do not allow me to move/delete them via samba/AFP (on mac). I manually chmod the "downloads" folder and now I can move out the existing files but any new one gets some strict permissions and I need to use the file browser to move or delete them. Is there a way to set permission of downloaded files in order to access them via samba/AFP? Transmission-daemon run as root, but I could not install it otherwise, afak (I'm sorry, I'm not an expert and I'm not always sure about what I'm doing...).

Thanks for any help.