事前 じぜん記録 きろく媒体 ばいたいではありませんでした
jizenkirokubaitaidewārimasendeshita

Noun
Desu Copula

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

1. Was not a pre-recorded medium.; Was not a prior recording medium.

Past/Perfective
Negative
Polite
Formal Register
Computing