I love my Synology NAS, however one of its flaws is it creates these @eaDir directories that while in most cases are hidden, show up in XBMC when you connect using NFS. To avoid this issue; create a file ' advancedsettings.xml' in .xbmc/userdata folder with the following content.
My collection of Home Assistant, CoreELEC, IoT, Synology, Kodi and other technical tips gathered over the years.