typically indicates a Blu-ray Disc 9 (or a 9GB encode, but more likely a scene release naming convention for a 720p/1080p Blu-ray rip).

However, official episode listings for S02E07 of Abbott Elementary show the title as: — originally aired November 2, 2022. If you found a file named abbott.elementary.s02e07.bd9 , it’s likely a pirated Blu-ray rip, as no official commercial Blu-ray of Abbott Elementary uses “bd9” in its retail naming.

It looks like you’re referencing a specific file or release label for Abbott Elementary Season 2, Episode 7.