This method is done in a version that features a Russian menu.
And that version and the 100% save will be available in the resources tab.

Following the images from the link below: https://imgur.com/a/tlhipW2
Showing how to backup and restore the save.

Steps:
1 - Copy the "save.dat" file
2 - Paste in the "files" folder
Directory: (Internal storage)/backup_mt/Resident_Evil-4/files