What are the options and if it's meaning like when you save something it has .pdf .jpg or .doc after the title then it would be ".doc"
It is a code for representing 128 English characters as numbers, with each letter assigned a number from 0 to 127. For example, the ASCII code for uppercase M is 77. Most computers use ASCII codes to represent text, which makes it possible to transfer data from one computer to another.
It's GigaBytes actually. And is it RAM or storage capabilities?
And also those are brands. Not models. For example, Samsung has different phones. Not just one.
There Is an App that you downloaded that allows this. you have to find it and disable it
PNG- Usually if you look up your picture and then add png to the end, it has a transparent background. Make sure it has free usage, though.