Copying the files from windows  laptop to amazon EC2 instance running Ubuntu.

C:\Users\suvarna\Downloads>pscp sppu.jpg ubuntu@ec2-XX-XX-151-245.ap-south-1.compute.amazonaws.com:/home/ubuntu/
Fatal: Disconnected: No supported authentication methods available (server sent: publickey)

C:\Users\suvarna\Downloads>pscp sppu.jpg ubuntu@amazon-ec2:/home/ubuntu/
sppu.jpg                  | 105 kB | 105.9 kB/s | ETA: 00:00:00 | 100%


C:\Users\suvarna\Downloads>pscp SPPU2.JPG amazon-ec2:/home/ubuntu
SPPU2.JPG                 | 50 kB |  50.8 kB/s | ETA: 00:00:00 | 100%

C:\Users\suvarna\Downloads>pscp LandscapeHouse.jpg amazon-ec2:/home/ubuntu
LandscapeHouse.jpg        | 2097 kB |  80.7 kB/s | ETA: 00:00:00 | 100%

C:\Users\suvarna\Downloads>

amazon-ec2 is the saved session  in the window's machine's Putty.