Turn off deep sleep for an external USB HDD on raspberry pi

gistfile1.txt

sudo vim /boot/firmware/cmdline.txt

# At the end of the command add  
usbcore.autosuspend=-1 usb-storage.quirks=174c:55aa:u

# reboot

# Test with
cat /sys/module/usbcore/parameters/autosuspend
# Should show: -1

dmesg | grep -i "174c\|55aa\|uas\|quirk"
# Should see UAS is ignored for this device, using usb-storage instead

# Edit the hdparm configuration file:
sudo vim /etc/hdparm.conf

# Add these lines at the end of the file:
/dev/sda {
    spindown_time = 0
}