I've bought a 4 terabytes external hard drive to substitute my older 1 terabyte drive. I've copied everything there was on it and ended up with this [see attached picture]: On the left it's the old drive and on the right the new one. How is it possible that the same files occupy way less space if on a different drive? Does it mean I lost some data somehow during the copy? Even weirder, if I try to check the size of the files by selecting everything and clicking on properties, it gives the original dimension, 667, on the new drive too. What's going on?