"BD" often refers to Blu-ray rips, while "YS" is a common prefix for specific Asian modeling agencies (like Young Champion or Yoshimoto).
To give you a "detailed review," I need to know what you found inside. Tell me: (e.g., 500MB vs 4GB). BD-YS_040.rar
A serialized backup from a specific creator or private forum. "BD" often refers to Blu-ray rips, while "YS"