KeePassXC for desktop, KeePassium on iOS,Managing the MEGA accounts isn't a problem. I don't use a zippyshare account - you can upload anonymously.
If you prefer your horror fast action with lots of gore and a body count you might find it boring. This movie is slow burn. There are times when they spend a little too long reinforcing Caroline's isolation and fragile mental state, and the ending feels a little sudden by comparison, but overall I thought it was good. See how long it takes you to figure out why the little girl is there.