Mouse cursor freezes when I connect my ext hard drive and disc drive

[neilab]

No changes since purchased, The issue seems to be centred around connecting external drives to the two USB3 ports, if I remove one then all is well, if I connect both the mouse cursor freezes on the screen. It is the same if I use the USB 3 micro ports with an adaptor. Both devices are according to the instructions USB3.0 compatible.

[savvy2]

no external HDD told  (maker nor model) there are 1000s of models for sure last 10 to 20 years, 2001 first SATA drives made. (big drives use huge currents,  3.5" and 7500 rpm and up are worst) but faster.

first is the rule of power. 

you have 2 drives, and with 2 you  just overloaded the 2 USB ports VBUS  chip on the main board. and now mouse is dead.

Vbus chip do 1 of 2 things in that stated, roll back to zero volts or fall off fast, to a voltage that ends the overload.

in both cases the voltage is now illegal.  too low to even run a mouse.

VBus is  chip that creates the 5vdc to each uSB port, some chips have 4 of them in one chip,  like most new PCs have.

the problem is sharing, them. fails..

now the secrets nobody knows, the VBUS chip (usb power) is shared on pairs ever even 4 posts.

this is AIO with very very limited USB ports

on full disktops this is easy to fix for 8 to 10 USB ports, we move the HDD to ports far away and guess what has its own Vbus power chip and runs ok at the USB3 900mA limit,

the problem is overloading USB,.

your pc spec

2 USB 3.1 Gen 2 Type-C™;

3 USB 3.1 Type A (1 support battery fast charging 1.2); 

so put one drive far from the first, port.  seems not easy.

there is simple cure,  use a high powered USB , extender  like see end of here.

usb3 is spec';d 900mA per  port may a PC made it is on all 3 or 4 ports total, or just on rear, and 900 more front. (real desktops are better)

https://pcdied.com/external-hdd.html#Cures

at end of page see the magic USB 25watt hub, it does what your PC can not do,

USB 3 is compatible and downward but power is special,  and complex same page explains why.

some PCs have very powerful jacks others low or shared in a very bad way.....

I have USB tester here, and seen all this horror endless.

I  have dell laptop here new that does 2.5 amps on each USB port , INDEPENDENTLY, amazing.

my HP  Z600 does  this.

my HP Workstation XW4600 is 500mA, and shared in  4 pairs super easy to overload it but move to other quad pairs and no problems,  mY HP z600 does 2.5amps all ports,

one more overloading device common is keyboards with backlamps   (and all turned on)

a HDD can uses 200mA to run, some even more, all my 3.5" HDD all burn 2amps to start the motor inside

if I forget to do that, (power pack attached ) it overloads a bank of USB3 ports,  seen it all I have, and have over 10 years of many classes of external drives here, mostly retired, but use only USB-c now, with fasted HDD on earth form Seagate.

6TB.

I have backups servers too but off topic.

im my lab  turn on your PC

I connect my USB meter and then load down the port with 1amp to 2.5amps or  more.

when voltage drops I stop and measure all other port, and see wow ! look here 4 or 5 ports all shared and all overload at the same time at only 1 port USED !, 1/2 the PCs here do that both Dell and HP.

end power play 1.