Transferring information[possible mild spoiler]

[Mudbill]

Most of the time, data is just formatted and converted differently depending on the media used. For a CD, it's formatted as binary laser scans (if I'm not mistaken), whereas an SSD is completely digital (well, not that a CD isn't but..), and although physical, it feels more like a normal copy/paste than a transfer to me. As kojack said, the data isn't really moved/transfered in that sense. It's copied and deleted. When you move a file from one drive to another, it copies the file and then deletes the original once done. This is why, if you cancel a move half way through, it doesn't end up with half a file in each location as that would be very unstable and unreliable.