Comment by Volundr

Discovery is a process in a legal proceeding. Say I think your providing me components that don't meet the spec called for by a contract. When I sue, at a certain point we reach the discovery phase, where you can be required to turn over all your communication about sourcing these materials as well as all communication about me. These orders are generally pretty broad, and the penalty for failing to disclose something (or worse) destroying evidence is high, hence why for example they wouldn't let her delete the pictures.

As usual the best advice in a situation like this is get your own lawyer.