Seagate 2T travel drive connection port problem

I have two hardly used 2T travel drives. One red and one blue. They both do not connect properly, it feels as if the drive's port are worn. And that is impossible! I have a 500G Seagate travel drive for 2years and I use it VERY much, but the port gives NO trouble. Why are these two new and expensive drives such bad quality? I've always just bought Seagate...but now I am thinking their standards has dropped!