事前 じぜん記録 きろく媒体 ばいたいでしょう
jizenkirokubaitaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 事前記録媒体

1. Probably a pre-recorded medium.; Likely a prior recording medium.

Polite
Presumptive
Conjecture
Computing