Backup garbles filename from "IMG_XXX" to (e.g.) "f23aa0c696c47484-photo"

I was trying to fix the issue i found from copying my files to the drive, which was that “~photo” was added to the end of every single image, overriding the original file number. SD support suggested trying the backup feature instead. This completely made a mess of the filenames, changing it from IMG_XX to a total mess of letters and numbers.

PLEASE fix this app so that it simply copies the files without changing their filenames! I have four 256GB drives, and am considering returning them all because of this problem. It makes things really difficult for my work, which requires those original file name numbers to remain intact.