On 25/03/2019 17:29, Roby wrote:
> I use one of the USB ports (rpi3 B) to manage and control the APC UPS,
> but I don't think that putting an HD / SSD USB on one of the free ports
> can cause problems ....

A low power 2.5" HD or an SSD will be no problem if you have a decent
2.5A to 3A PSU on the Pi.

> I could try, or I could wait for the RPI4, hoping it has a dedicated
> port for external HD or a faster USB 3.1 port.
> ..... I'll see what to do ...Thanks

There are some Pi alternatives with dedicated SATA and/or USB 3 ports.
Only trouble is they have far poorer software support, and often run old
3.x customised kernels.

---druck

--- SoupGate-Win32 v1.05