so I just have a quick question to clarify how having the same game on two drives work. if I make a copy for my steam library from my home drive to my usb. when i disconnect home drive and play/save on the usb, will the changes to on the usb be saved on the cloud and transfer onto my home drive when i play the same game, or will it be treated as two separate copies.

basically, i don't want to bring my 4tb drive with me everywhere i go and don't want move the game to my usb because I don't have enough usb ports to plug both my homedrive and usb to use my whole library.