The cable has two USB 2.0 jacks for cases where the USB ports of your PC are not powerful enough, I tested them separately to operate the hard drive and one with enough ... But this will depend on your equipment ..
SATA plug has two LEDs that show you the proper functioning:
- Power (red)
- Access (blue)
No overheating, file transfer speed (up 29,8Mo / s) is consistent with what can be expected of the USB2, it took 71 minutes to transfer 100 GB of miscellaneous files (photo, audio , video, text)
5 stars for cable, but much less for the delivery not respected!