Secured files date issue

I transferred all the files on my iphone to my iXpand drive and secured them with the secure option and deleted them from my phone… the thing is now the creation dates of the files which suppossed to be the date the pictures or the videos were taken is now all the date i secured the files on the ixpand drive ((which is so not accurate since it has photos from years ago))… do u know anything that can solve this problem and help me restore the real date of each file… pleaaassseee help :(((

when you copy a file is is actually a new file. the date creates will be the date the file was copied. the date modified or date taken fields should show the date the the picture was taken.