It's about two-fifths as much as a Magnetic Stripe Card.
In other words, the amount of a Magnetic Stripe Card is 3 times 308 bits.(maximum capacity; per ISO 7811 specification)
The storage capacity of a magnetic stripe on a credit or identification card is about 1,000 bits. According to legend, Forrest Parry, the IBM engineer who developed the first magnetic stripe card in 1960, was able to solve the problem of adhering the strip to the card after his wife suggested using an iron.
It's about one-sixty-fifth as much as a Page of Text.
In other words, the amount of a Page of Text is 63 times 308 bits.(50 lines, 50 characters per line, ASCII encoding)
It's about one-forty-thousandth as much as a Floppy Disk (3½-in).
In other words, 308 bits is 0.0000261095 times the amount of a Floppy Disk (3½-in), and the amount of a Floppy Disk (3½-in) is 38,300.2 times that amount.(high density, IBM PC format)
It's about one-forty-thousandth as much as a Digital Photo.
In other words, the amount of a Digital Photo is 42,000 times 308 bits.(5.3 megapixels, JPEG compression, 100% quality, 24 bits/pixel)
It's about one-one-hundred-thousandth as much as a MP3 Song.
In other words, 308 bits is 0.00001 times the amount of a MP3 Song, and the amount of a MP3 Song is 100,000 times that amount.(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)
It's about one-one-hundred-fifty-thousandth as much as The Complete Works of William Shakespeare.
In other words, the amount of The Complete Works of William Shakespeare is 140,000 times 308 bits.(ASCII, plain text)
The Complete Works of William Shakespeare would occupy about 44,000,000 bits 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 0.00000005 times as much as a Compact Disc.
In other words, 308 bits is 0.0000000498 times the amount of a Compact Disc, and the amount of a Compact Disc is 20,080,000 times that amount.(80-minute, 360,000 sector disc; "Red Book" specifications)