事前 じぜん記録 きろく媒体 ばいたいじゃなかったです
jizenkirokubaitaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 事前記録媒体

1. Wasn't a pre-event recording medium.; Wasn't a prior record carrier.

Past/Perfective
Negative
Polite
Casual Register
Computing