SIMPLE STEPS TO DELETE FILES ON YOUR SURFACE

If you do not have a memory card and are looking for more space on your device just follow these simple steps to  delete any unneeded files:
Disk Clean Up
  1. Run the desktop’s Disk Cleanup program. Type “Disk Cleanup”  into the Cortana search bar in the bottom left of your screen.
  2. Select the Disk Cleanup option.
  3. Tap the Clean Up System Files button near the window’s bottom.
  4. Select the boxes next to the items you want to delete.
Tap the OK button to delete the files. When you delete the files, they’re gone for good.