You can’t even buy 5 Mb of storage anymore, and you can buy 2000 times that much for about $30 in a USB drive about the size of your thumg.
But in 1956, this is what it looked like. It was very expensive and could be leased from IBM for the modern equivalent of $30,000 per month. To store one hi-res movie, you would need about 400 of these, which would cost you $1.2 million per month. Quite a lot just to have access to My Cousin Vinny when you want it.