@LMNOP1 wrote:
It seems when I upload the photos ion Drop Box, the create date is being changed to the date of the upload.
That's correct, and there's no way around that. As the files are being newly created on the Dropbox servers when you upload them, they get a new creation date.
If you're able to move the files to a newer computer, using an external drive, for example, you can let Dropbox sync them and they will retain their dates.