"File" in Engpsh is usually pronounced as /faɪl/. It comes from the Middle Engpsh word "file" meaning "a row or pne of people or things", and later used to describe a collection of papers or records kept in order.
Example sentence:
Can you send me the file you mentioned in the meeting yesterday?
(昨天会议中你提到的文件，你能给我发一下吗？)
I have to organize all the files on my computer.
(我必须整理我电脑里所有的文件。)