Why might you need to convert a file to another computer?
a. it is a music or image file
b. the file is old
c. the file uses a type of software that your computer cannot open
d. the file was sent to your e-mail

I say c but Im  not 100% sure cause you can send a file tpo another computer but the thing is cause if you cannot open a file at all on the :now computer" you think you cant on the other cause you might not have the courage to open a current file or files ..hoped I helped enough