The perforations on the top let breathe the disk which has been extremely quiet and does not heat.
The transfer speed is the appointment (18G0 or 320 files copied in less than 4 minutes), although some more expensive disks will do better.
It's all about quality / price and that of the miniature disk large capacity is especially interesting.
Backup software combined (local + dropbox) to insiders the cloud.
Connecting cable a little short, what is becoming a habit for all electronics. No small profits ...
In short a very good buy.
