"Um" did you use voice input lol? No, type in the definition of portable of google. It it states and I quote
Portable - able to be easily carried or moved, especially because of being a lighter and smaller version than usual.
Well..
Portable Devices
There's no standard definition for "portable device," although this term probably has been in use longer than the term "mobile device." As the name implies, a portable device simply means something that is small and lightweight enough to move around and carry with relative ease. Even the first laptop computer, the Osborn 1, which weighed a whopping 24 pounds, was considered a portable computer.
"Portable" is a broad term that encompasses everything from a printer that can be carried around to a smartphone you carry in your back pocket. The term occurred much more frequently before
laptops and smartphones became popular, perhaps because before the smartphone revolution there was a clear distinction between computing devices that could be (fairly) easily moved and those that couldn't be.
Portable versus Mobile
These days, most gadgets—including phones, tablets, and laptops—are more often considered mobile devices. The distinction is a fine but important one. Rather than focus on an item's portability and ability to be carried, the "mobile device" term describes how it helps us users: They're small and capable enough to allow
us to be mobile.
The term
mobile device also connotes wireless connectivity. If a mobile device doesn't have internet access, we probably wouldn't consider it a very capable productivity enabler these days.
The connectivity question could now be the fine line between "portable" and "mobile" devices. An external hard drive or external battery pack, for example, might be considered a portable device, while a small wireless hotspot could be considered a mobile device.
In the end, differentiating between the two terms might be like splitting hairs, since most gadgets—portable or not—are getting wireless or connectivity features.
There are a ton of portable devices now these days, though, from media players and game consoles to wearable computers and smartphones. We've come a long way so that
even monitors are now portable and mobile.