It means downloading a 20-megabyte file before your finger lifts from the glass.
From the nytimes.com
A 512-megabyte memory card can cost between $60 and $150, depending on its type.
From the usatoday.com
Soon the same will be true for a megabyte, and then soon after that a terabyte.
From the economist.com
That compares to nearly $20 per megabyte if you don't have an international plan.
From the usatoday.com
In the paid tiers, FreedomPop is charging a half-cent for every megabyte overage.
From the businessweek.com
I can download things, when the connection works, at a megabyte a second or more.
From the techcrunch.com
A stripped-down, 512-megabyte iPod Shuffle with no screen or keyboard costs $100.
From the usatoday.com
Say, $50 per month for 200MB of bandwidth, with an additional $10 per megabyte.
From the techcrunch.com
The original 8088 microprocessor could only address 1 megabyte of physical RAM.
From the en.wikipedia.org
More examples
A unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes
The megabyte is a multiple of the unit byte for digital information storage or transmission with two different values depending on context: bytes (10242) generally for computer memory; and one million bytes (106, see prefix mega) generally for computer storage. ...
This is a list of characters from the animated television series, ReBoot.
One million bytes. SI Symbol: MB; 1,048,576 bytes; a mebibyte. Frequently abbreviated MB
(Megabytes) A measure, representing 1,000,000 bytes generally used to express the storage capacity of digital A components. A byte represents a single character, or group of eight bits.
Megabytes indicate how much internal storage is on the camera. The higher the number of megabytes, the more pictures can be stored on the digital camera. Some cameras give you the option to select image quality. ...
A unit of measure that consists of 1,014 bytes.
(1) When used to describe data storage, 1,048,576 (2 to the 20th power) bytes Megabyte is frequently abbreviated as MB. (2) When used to describe data transfer rates, as in MBps, it refers to one million bytes.
Literally 1,000,000 bytes; usually 1024 x 1024 bytes.