Finder on a Mac problem

Hi

I hope this thread is in the correct place.

I seem to have a problem that I have some files that I moved across to an external hard-drive, but it seems to have lost some of the meta-data.

See here & here to clarify what I mean.

They are folders containing photos, but I cannot seem to nail the date they were taken, even though the camera holds that data.

It shows that the most of the folders were created on the dates that the information was transferred from the C:// to the external HDD, but that's it.

I hope you know what I mean.

Thanks