External hard drive: Troubleshoot error code 0x80071ac3
Simultaneously press the [Windows] and [E], to open Windows ExplorerGo left to "MY Computer" and look for the hard disk or USB stick.
Click on the external hardware with the right mouse button and select "Properties".
Jump up to the "Tools" tab and click on the button marked "Check Now".
Activate all the available options and start the process.
Depending on the size and speed of the hard disk, the process can take several minutes.
Fix Error 0x80071ac3: Format HDD
If you can not repair the external hardware, you need to format the device completely. You must copy all the files from the hard disk / USB flash drive to your computer or another media.Reopen the Explorer and click again with the right mouse button on the hard drive.
Now select the "Format" a small window will open.
Click on the button "Device Restore Defaults" and "Start."
Confirm with "Yes," the disk is formatted and the error will no longer appear.