Multiple choice general knowledge science & technology What is High Density Disk? DVD - Digital Versatile Disk Double sided DVDs Multi tracked magnetic tape A 1.4 MB floppy disk. Reveal answer Fill a bubble to check yourself D Correct answer Explanation High Density Disk (HD) typically refers to the 1.4 MB 3.5-inch floppy disk format that was standard in the 1990s. This was double the capacity of the earlier Double Density (DD) 720 KB disks. DVDs came later and used different technology entirely.