You don't need a power cable, because the hard drive is powered via the USB cable.

With this hub, you have 4 extra USB ports for peripherals such as a mouse and a keyboard.

The aluminum casing makes this USB flash drive resistant to drops and bumps, which keeps your data protected.

With this adapter, you can convert the USB-C (Thunderbolt 3) input of your Mac to a 'standard' USB-A input to connect all your older peripherals.

Thanks to the transfer speed of 1050MB/s, you can transfer files quickly.