Hi William,
Welcome to Microsoft Community, Thank you for reaching us. We apologize you are getting this problem on your Surface Laptop. Regarding your question yes it is possible to back up your files using the command prompt.
Please follow this steps to back up your files:
Check to other device if your USB Drive / External HDD, SSD
got enough space to backup your files.
Make sure to connect a USB Drive / External HDD, SSD to your
Surface Laptop.
DISPLAY LIST ALL FILES IN A FOLDER / SUBFOLDER using CMD
Click Start / Windows button
type "CMD"
press Enter
Inside CMD type "dir"
Then press Enter
It will show all the list of folders and files inside your Surface Laptop.
Take a screenshot or notes of the available files.
DISPLAY LIST ALL DRIVES using CMD
Click Start / Windows button
type "CMD"
press Enter
Inside CMD type "diskpart"
Then press Enter
it will show "DISKPART"
type list disk then press enter
it will show "DISKPART > list disk"
It will show all the list of Drives inside your Surface Laptop.
Take a screenshot or notes of the available Drives.
COPY FROM DRIVE AND PASTE TO ANOTHER DRIVE using CMD
Sample if folder is coming from Desktop type this:
"cd C:\Users\AccountName\Desktop\Sample folder /s/e/f"
then to move or paste it to your USB (if USB is E:)
type this
E: \Sample folder\
then press Enter
sample: "C:\Users\AccountName\Desktop\Sample folder /s/e/f E: \Sample folder\
then press enter
wait for 2-3 minutes to finish the copy and paste
once result is "copied" it is completed
If there’s anything more you’d like to share or questions, please don’t hesitate to reach out.
Warm regards,
Jansher Liwag
Microsoft Community