SSH or secure shell is best and secured way to connect and remotely manage your computer from anywhere
but most of the time people use it from terminal which is text-based CLI . Its really difficult for beginners to transfer files using secure copy command (scp ) .
If you want to transfer files in GUI mode here is the quick and dirty way
3 : after connection automatically mounted folder will open , then use that folder for normal file operation like , drag and drop like operations
5 : after transferring data unmount the location or keep it it depends on you
Watch it in action
Enjoy transferring file over ssh