Hi I have just recently today had the same issue saying that the expansion is corrupt and cannot verify content . I have just managed to get destiny 2 started. I noticed that part of the game was on my internal drive and some of my add ons were on my external but this has always been the way up until forsaken update, so i transfered all content to internal drive but still Destiny would not work. Almost giving up hope and the thought of deleting Destiny 2 and re installing almost 75gb was not a cheery thought. I gave it one last chance, i happened to got to settings and storage and went on clear more space when it came up with an add on that had been left behind bearing in mind this add on was not even with the other content i had previously transfered. Some how my Coldheart 10mb file had been left behind so i tried to transfer it to my internal which it said it had but it still did not show so i went back to settings and storage and make more space and yo and behold it was there again this time i deleted it. Did a cold restart of connsole (complete shutdown in settings ) re started went back to games store re downloaded coldheart which was then showing in the correct folder. Started the game and hey presto it now works. So the morral to this is check your storage and go to extra space just in case an add on has been left behind. Right off to play first mission good luc to all that have this problem and i hope that this may help others.