For ec2 server

#move your key to /tmp or right folder on server

Assign right permission

sudo chmod 600 /tmp/dev-sunrobotics-snippetbucketcom.pem

then connect to server or transfer

scp -i /tmp/dev-snippetbucketcom.pem filestore.tar.gz ubuntu@85.111.5.33.98:/tmp

Make sure in your ip security you have allow ip address to connect