The Groundsman wrote: 
> Thanks a lot. Feel confident now

I have one idea how you can use a Pi 4 with a 2,5" HDD without power
problems. I didn't thought at this at first.

I am using this type of installation here for a Pi 4 which is used for
LibreELEC (Kodi installation) and two external 5TB 2,5" HDD.

The main part is this USB 3.0 hub:
https://www.amazon.de/gp/product/B07RL74YHZ
The hub is getting 12V with 2A from the power adapter. The Pi 4 is
connected to the red connector for power (USB-A to USB-C cable). The two
2,5" HDD are connect to the blue connections and one USB 3 port of the
Pi is connected with the USB 3 input on the small side of the hub.
So the two HDD are getting their power from the hub and also the Pi is
getting it's power from the hub.

I made many tests, even with three HDD and the voltage was always stable
so I never saw the yellow lightning in the top right corner of the
video.

All other tests with big external power supplies and both USB 3 HDD
directly connected to the Pi 4 result in the yellow lightning.



pi4 4gb picoreplayer with lms and squeezelite for usb inside an argon
one case
pi3b+ (7\" display, hifiberry dac+ pro) picoreplayer with
squeezlite/jivelite for hifiberry and bluetooth headphone inside a
smartipi touch case
two airport express
ikea symfonisk
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