I got the same problem. My SSD is full and with the Fianl Stand I don't have enough space for it. I do have another 2 HDD's but for some reason I can't install the Final Stand on neither of them. So I go to BF4 > Game Details> Expansions > Last Stand > Chage drive > Select different drive > Start download. So then it stops somewhere at 50% and tells me that the drive is full. Then I check all drives and I see that the updates have been installing on my SSD drive even tho I did change it to another drive. I've done this couple of times, every time the same issue. I am not sure what I'm doing wrong. Haven't played Battlefield 4 since then release of the Last Stand.
