Hi,
Kayece here, An Independent advisor and a user just like you. I will be happy to assist you today.
I understand that you wanted to create a backup to your external drive before doing a factory reset on your Inspirion 16 Plus.
May I ask if you can go to your laptop home screen? If you could able to do so, please follow the steps below.
*To back up to an external drive, connect your external drive to your device, then open File Explorer.
*The external drive should appear in the left-side panel of File Explorer.
*Copy the content you want to back up by right-clicking on the folder or file and selecting Show more options > Copy or highlighting the folders and files and selecting Ctrl + C.
*Paste the copied files or folders into the external drive in one of two ways. Right-click on the drive’s folder icon and select Show more options > Paste or open the drive’s File Explorer window and select Ctrl + V.
Source: https://www.microsoft.com/en-us/windows/learnin...
Or create a recovery drive by following the steps on the support link below.
https://support.microsoft.com/en-us/windows/cre...
If you are unable to boot properly, you may follow the recommended steps below to back files when Windows Won't Boot or start or follow the method on the videos.
https://answers.microsoft.com/en-us/windows/for...
https://www.youtube.com/watch?v=kbMXk1_n-7E
You can also do this in windows 11. Please download the Windows 11 installation media on the link below.
https://www.microsoft.com/software-download/win...
Hope this helps. if you need more assistance, let me know.
Stay Safe!
Disclaimer: There are links to non-Microsoft websites. The pages appear to provide accurate and secure information. Watch out for ads on websites that may advertise products that are often classified as PUPs (Potentially Unwanted Products). Thoroughly research any product advertised on websites before deciding to download and install it.