所定 しょてい期間 きかん保存 ほぞんファイルだったら
shote iki kanhozonfairudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 所定期間保存ファイル

1. If it's a file saved within the designated period.; If it were a file saved within the designated period.

Tara Conditional
Computing