Popping in to one of these threads again to remind people that these large content downloads aren't adding to the game's file size like the download size suggests. A lot of the content being downloaded is overwriting existing files.
Your ESO installation didn't get larger by 50gigs. I don't know exactly how much of it were new files, but the majority of it weren't
CP1,200+Master Explorer - AvA Praetorian - Console Peasant
As stated above, relief is coming. It will require downloading the client again. Even PC will have to do this. We should also ask if a delete of local files first will help those who have storage challenges just prior to the next update.