How to Turn Off Hard Disk After Idle in Windows 10
The "Turn off hard disk after" power option lets users set to have hard disks (HDD) power down after a specified time of HDD inactivity is detected. This will not affect a SSD (Solid State Drive).
Having your HDDs automatically turned off after being idle can help save energy and extend a PC's battery life.
When you or anything tries to access a HDD that has been turned off, there will be a delay of a few seconds as the HDD automatically spins back up and is turned back on before being able to access it.
This tutorial will show you how to turn off hard disks after being idle for specified minutes or to never in your power plan in Windows 10.
If you have set to turn off hard disk after idle, then you will experience a delay if you restart explorer
since you will have to wait for all disks turned off to spin back up and turn on before explorer is restarted.
1. Open your advanced power plan settings.
2. Expand open Hard disk and Turn off hard disk after, set how many minutes or never for what you want, and click/tap on OK. (see screenshot below)
The default is 20 minutes.
It is not recommended to set a low amount of minutes. Doing so can cause more wear and tear on HDDs since they will spin up and down more often.