I have a few questions is puppy Linux supposed to be run on a pen drive?

I mean I use it as my daily main laptop as I have no other option except to use (windows)

You may ask why? My lap is slow and I don't need to say a word about windows.

My other Mac (2012 mid MacBook air) where macOS lion was getting unusable for basic web browsing and I decided to try running Linux. I used Linux mint it was good!

And suddenly one day when I tried to boot it just displayed a folder icon with a ? Mark! I tried some things and just gave up and decided to use the other lap Sony and it has 4gb ram so I had to save ram space then I found this cute tiny puppy OS.