Google Takeout Date issue

[Chris_Efas]

Hi,
I recently exported all of my Google Photos (100,000+ photos) via their Takeout.

Initially, I was going to use Metafix to unzip them and hopefully ensure all data is kept.  But it got so far and then just hung.
So I then just used the Mac terminal to unzip them all, and it seemed to do an okay job, I thought.!

Now I moved them all onto my Synology NAS, and after it spent ages indexing, I have 40,000 photos on the day I did this (11th October).

A really kind guy via Facebook Synology group helped over the weekend, and took a look at a couple of example files.
I then also sent him the corresponding json file.

He said "of the 4 samples, all the ones with the date in the file name do NOT have a Date/Time Original attribute in the metadata.  Somewhere along the line that attribute had been stripped from the files"

I am way out of my league with this, but really want it sorted.
To have 40,000 pics in the wrong place datewise is super annoying.
To re-enter the date manually, will take me years.!

Any help really appreciated.

[Phil Harvey]

Does the date appear in the .JSON file?  If it does then you may be able to use ExifTool to copy it back to the image file.

- Phil