When i transfered my game files the textures stopped working!

when I transferred all my game files from my old pc to my new laptop, the textures have gone invisible and do not work anymore. The files are not corrupted because I downloaded a character pack from the store and the textures are invisible on that too. The object is still there and I can use it how it was, but as I say, it is just invisible. Is there anyway I can fix this because it took me a long time to make the textures and I did not make a backup!