SD Card – Android Encryption Key in Windows Manual Backup

I did a factory reset and then realized that I had not deciphered my SD card. I know the data is probably lost, but I made a full copy of the internal storage connecting the Samsung J5 mobile phone to a PC (drag and drop, I know it's not the right solution). Now I can not find / data / misc / vold to locate the encryption key file as I have read it in other articles.
Is it possible to read these folders with a Linux virtual machine installed on the PC and recover the encryption key file, or has it disappeared forever?