所定 しょてい期間 きかん保存 ほぞんファイルなら
shote iki kanhozonfairunara

Noun
Da Copula

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

1. If the file is saved for the specified period; If the file has been saved for the designated period

Nara Conditional
Computing