I've been testing >4Gb persistent live-usb with ubuntu 19.10 + rufus on a 32 Gb usb stick but somehow I ran out of space as soon as I upgraded to get full functionality.
So I bought a 128 Gb usb stick and did it all over again (I'm writing on this persistent ubuntu right now). I specified maximum aviable persistent storage (about 117 Gb if I remember correctly) on rufus, but somehow the Disk Usage Utility tells me I've got only 31 Gb of free space ! And I haven't upgraded yet !
So, 31 should be enough to get my OS upgraded and install full LaTeX support but still, I'd like the ~90 missing Gbs to be usable.
Any idea ?