Strange one this. I can't tell if this is a Windows 10 or an Acer issue.
Model number: A315-41-R9YH
When on battery and the screen turns off, I can hear the hard drive constantly powering down and up. It sounds like it's going through hell. This doesn't happen when connected to the mains.
Check out video in the link. You might have to turn the volume up. You can hear the hard drive doing the thing I mention once the screen goes off.
I thought it might be the power settings. So I went to advanced power settings and set "Turn off hard disk after 0 minutes (i.e. never)" on both battery and power but it didn't make a difference.
Thanks in advance.