To move files between your CT40 and your computer:
Connect the CT40 to your computer using a USB charge/
On the CT40, swipe down from the top of the screen to see
the notifications panel.
Select USB charging this device, and then choose either
Transfer files or Transfer photos (PTP).
Open the file browser on your computer.
Browse to the CT40. You can now copy, delete, and move
files or folders between your computer and CT40 as you
would with any other storage drive (e.g., cut and paste or
drag and drop).
Note: When Provisioning mode is turned off, some folders are hidden
from view in the file browser.