> Not directly related to your issue but I got many pictures which
> filedate weren't the one taken so I developped a series of F9 script
> using external utility jhead. Might be useful ?
>
> Below are 6 F9's scripts. You can customize to your taste.
>
>
> ::- Jhead set date to exif | Date+Name
> :: Free utility at https://www.sentex.ca/~mwandel/jhead/
>
> CD /D "#ZTTools\Jhead\"
> jhead.exe -ft -autorot -n%%%Y-%%%m-%%%%d-%%%H-%%%M-%%%S_%%%f
> "%2:%3\*.JPG"
> pause
>
>
> ::- Jhead set date to exif | Date+Name (Alt YYYYMMDD_HHMMSS)
> CD /D "#ZTTools\Jhead\"
> jhead.exe -ft -autorot -n%%%Y%%%m%%%%d_%%%H%%%M%%%S_%%%f
> "%2:%3\*.JPG"
> pause
>
>
> ::- Jhead set date to exif | Name
> CD /D "#ZTTools\Jhead\"
> jhead.exe -ft -autorot "%2:%3\*.JPG"
> pause
>
>
> ::- Jhead set date to exif | Date
> CD /D "#ZTTools\Jhead\"
> jhead.exe -ft -autorot -n%%%Y-%%%m-%%%%d-%%%H-%%%M-%%%S
> "%2:%3\*.JPG"
> pause
>
>
> ::- Jhead set date to exif | Date
> CD /D "#ZTTools\Jhead\"
> jhead.exe -dsft -autorot -n%%%Y-%%%m-%%%%d-%%%H-%%%M-%%%S
> "%2:%3\*.JPG"
> pause
>
>
> ::- Jhead change exif +1hour
> CD /D "#ZTTools\Jhead\"
> jhead.exe -ta+1:00 "%2:%3\*.JPG"
> pause
>
>

Thanks. Got it working.
I've had to move a few cobwebs out of the way, been a long while since I've written batch files.