the voice assistant file is a guide to use the account file when I need it, instead of a direct guide because as of 2019 I don't plan to use bitcoin right away.
Ok, so the person who sent you the files made a voice recording of what you need to do to access the wallet? Is that it? If it's an audio file, can't you run it in VLC media player, for example?
I am asking you a second time, what is the extension of the file you are trying to access?
Or if he's still active at the forum, hope he will get in touch and switch to bitcoincore new wallet for me.
If you got the files from a Bitcointalk member, did you get them over PMs? Did you speak to the user over the PM system? Check your personal messages and see if there is a way to contact him/her. Do you have an email of the person who sent you the files? How did you get them in the first place?