Over the decades the race between size of data files and hard drives has been a steadily decreasing margin. I well remember my first HD, 200 megabytes, which was enough to store 250 Amiga floppy disks. Over the years processors and I/O throughput have increased to the point where Video is now the dominant type of file, such that my pc has multiple 2TB drives and I have to manage my storage carefully. Long gone is the casual ability to back up on floppies, then CD's, then DVD's and even BluRay's are now impractical. Putting aside backups, when are we going to get the next paradigm shifting technology in storage? This link suggests things do not look good:
http://datascienceassn.org/content/peak-hard-drive
If I could afford a half dozen 6TB drives I would be set for a few more years, however the trend is downwards.