How large is the operating system?
I would like to know how loarge the OS is so that I will know how much actual storage is available so that I can buy the correct size MIcro SD card.
Rule of thumb is 20 Gigabytes. It will be a lot smaller out of the box but will grow as you start installing applications, drivers, tools, updates, and other items related to the operations system to make your programs work. Micro SD cards are replaceable you can always change those out. Your Hard Drive is a little more difficult to replace.