Safe connection?

Hi to everyone…
i want to ask something simple i hope…!
I owned 2 external discs and i’m waiting in about
a week my third. The one that i allready have is My Passport
1TB model WDBYNN0010BBL-WESN and the one that i’m waiting
for is My Passport Ultra 3GB model WDBFKT0030BGD-WESN.
My laptop is HP Envy Win10 64bit with 2 ports Usb 3.0 and 1 port Usb 3.1 Type-C.
My question is how safe it is to connect those two drives to Usb 3.1 Type-C port
about voltage ampere etc… (with an adapter 3.1 to usb 3.0 of course).

Thank you in advance

Hello, bilger

Well, USB 3.0, it moves up to 900mA (0.9A). The charging downstream and dedicated charging ports provide up to 1,500mA (1.5A). USB 3.1 bumps throughput to 10Gbps in what’s called SuperSpeed+ mode, bringing it roughly equivalent with first-generation Thunderbolt. It also supports power draw of 1.5A and 3A over the 5V bus. So I would like to inform you that using both the port with the external drive will not cause any harm to the drive as USB voltage does not increase to 5V it tends to be in 4.9 to 5.01~ V. All external drive works fine with this rated voltage.

Thank you very much for the information.