S.H.
.jpg
Which is jpeg.
Eventually, I would highly suggest, that you get an "external hard drive"... to back up everything on your computer.
In case it ever crashes.
I assume, from the sound of it, you have a PC and not a MAC?
The way you save photos... is about the image file format and size.
Once you open the file, it is an "original" photo. Digitally.
It is just being saved.... on the computer in a format which is per megabytes or bits or bytes and pixel data and the compression of the file etc.
Either way, it can be printed.