@OhLiz:
After I tried to fix the external the external drive doesn't appear on the disk management
What does that mean? What specifically did you do to "fix" the external drive?
The problem that I see looking at your first screen image is that you are trying to copy too much at one time. Your C: drive is full, so there is virtually no space for the creation of the temporary files needed to complete the copy operation. Moreover, you want to
move the files to the external drive, not just
copy them, if you hope to free up space on your C: drive.
Good luck. Have a great day.
Regards,
Phil