It's about one-fifth as much as a Page of Text.
In other words, 516 octets is 0.21 times the amount of a Page of Text, and the amount of a Page of Text is 4.8 times that amount.(50 lines, 50 characters per line, ASCII encoding)
It's about five times as much as a Magnetic Stripe Card.
In other words, the amount of a Magnetic Stripe Card is 0.2 times 516 octets.(maximum capacity; per ISO 7811 specification)
It's about one-three-thousandth as much as a Floppy Disk (3½-in).
In other words, 516 octets is 0.000349935 times the amount of a Floppy Disk (3½-in), and the amount of a Floppy Disk (3½-in) is 2,857.67 times that amount.(high density, IBM PC format)
It's about one-three-thousandth as much as a Digital Photo.
In other words, 516 octets is 0.00033 times the amount of a Digital Photo, and the amount of a Digital Photo is 3,000 times that amount.(5.3 megapixels, JPEG compression, 100% quality, 24 bits/pixel)
It's about one-five-thousandth as much as a MP3 Song.
In other words, the amount of a MP3 Song is 5,000 times 516 octets.(a.k.a. MPEG-1 Audio Layer 3, a.k.a. MPEG-2 Audio Layer 3) (128 Kbps, "near-CD-quality"; 3 minutes duration; average)
A three-minute song of typical quality will be about 3,000,000 octets when encoded into MP3 format. The song Tom's Diner by Suzanne Vega was used by AT&T-Bell Labs engineer Karlheinz Brandenburg to test the compression process and is considered the first MP3 song.
It's about one-ten-thousandth as much as The Complete Works of William Shakespeare.
In other words, the amount of The Complete Works of William Shakespeare is 11,000 times 516 octets.(ASCII, plain text)
The Complete Works of William Shakespeare would occupy about 5,600,000 octets when written in plain text without formatting. These works include 38 definitively-attributed plays — 11 tragedies, 17 comedies, and 10 tragedies — as well as 154 sonnets and numerous other poems.
It's about 0.0000007 times as much as a Compact Disc.
In other words, 516 octets is 0.0000006674 times the amount of a Compact Disc, and the amount of a Compact Disc is 1,498,000 times that amount.(80-minute, 360,000 sector disc; "Red Book" specifications)
A typical, 80-minute capacity compact disc, commonly known as a 734,000,000 octets disc will actually hold 773,100,000 octets of data. Such disks are 1.2 mm (0.047 in) thick.