A:AnswerYes, technically its a type of SSD. Its an EMMC drive. Its closer to a SD type flash drive. You can buy it with a 64GB or 128GB EMMC SSD drive and then add up to 128GB of Flash drive as well. I have heard of people adding up to 256GB on a flash drive. But the specifications state using a 128GB SD card as highest.
A:AnswerPersonally, I think that depends on what you will be using the device for. Either way, though, if you purchase the 64g you could always purchase a hard drive later to store access materials.
A:AnswerBy pressure levels I'm guessing you mean with the pen? You can use the pen with several different pressure settings. If yo lightly press it, the virtual ink is thin. If you press harder it virtually puts out more ink per say. You can change the thin and thickness of the flow in settings easily when using the pen.