boot-device: how to choose the right one - with a live example

[dhubs]

good day dear friends,
hello at all,


well dear guys this is a image of a thinkpad T520 (btw. i love these robust Notebooks)

what makes me wonder -

a. can i boot from usb-stick here?

b. is the hdd visible here!?

see here the image: https://imgur.com/a/pGNNhPo

and see the second one here: https://imgur.com/uxfUx64

well i guess that in the first pic there is no(!) HDD - but in the second list:

look forward to hear form you


additional: some more questions regaring the T 520

well currently i am musing on the question: to add a SSD and more RAM

well which type of SSD do i need here!?
Which RAM - does fit - U(at the moment i run 4 gigs

look forward to hear fom you

regards