EQ14 power supply and powered usb hub backfeed?

Helscur

Hello,
I am pretty happy with my EQ14. It works 24/7 under linux with all my dockers, one 1To internal nvme (system and dockers), one external SSD on USB (backups once per nights) and one zigbee usb dongle.
I am wondering if I can safely use an additional HDD on USB or if it will be too much for the power delivered? If it is too much, may I safely use a powered usb hub? Does it have a backfeed protection?
Thanks

Beelink CS-Bony

Helscur
Thank you for your letter.
The USB port can connect to external hard drives, and it generally does not exceed power limits.