Good day! efkorman,
To investigate further, the following solutions can be tried.
- If you have set any restore points on your Windows 10, try to remove them and see the effect.
Press Windows key + R to open the Run dialog > Enter: sysdm.cpl and press ENTER key > On the System Protection tab, select the available disks with protection enabled > Click Customize > Click Turn off system protection or Turn off system protection (in Windows 10) > Click Apply and then click Yes when you receive the next request > Enable system protection for the system drive.
- Check and confirm that your external drive has enough free space to back up new files.
- Perform a clean boot on your system.
Temporarily close the third-party security programs and optimization software that may exist under the system (with a firewall nature) > Press and hold Windows logo key +R > Enter: msconfig > Hit Enter > Click on Services > Check to hide Microsoft services > Click Disable All > Reboot the device, and confirm if the problem solved.
Disclaimer: A “clean boot” starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background program is interfering with your game or program and to isolate the cause of a problem. These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step so that it will help you get you back on track.
Feel free to keep me updated.