USB external drive doesn't sleep

Hi, I have usb external drive 2,5" (mechanical, no ssd) and this drive doesn’t go automatically to the sleep after some time when I don’t work with - it is constantly rotating.

You may check this:

Have a look at the “B” option. I used this on my Ubuntu Laptop in ~2014 when I had my last HDD :wink:

But remeber that spinning down a hdd too often wears it out more quickly.

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