Average use last summer was just 450 megabytes (MB).

ENGADGET: Shocker! Three's unlimited data adopters use lots of 3G

Since a single song can require up to 24 megabytes (MB)4 of memory, quickly filling up the Wii's 512MB of onboard storage, the SanDisk Rock Band 2 SD gaming card provides enough storage space for at least 75 downloadable songs and enables gamers to take advantage of Rock Band 2's extra content.

ENGADGET: SanDisk releases 2GB Rock Band 2 SD card for all your downloadable content

You can buy cards ranging in size from 8 megabytes to 64 MB, which is good enough to hold more than two hours of music.

FORBES: Magazine Article

It comes with 64 megabytes of memory, upgradeable to 192 MB.

FORBES: Magazine Article

It comes with 128 megabytes of RDRAM memory built in, expandable to 512 MB.

FORBES: Magazine Article

Previously limited to only 40 megabytes, the newer matchbook-sized PocketZip disks unveiled this week will hold 100 MB--as much as Iomega's first Zip disks when they first came to market in the mid-1990s.

FORBES: Ten O'Clock Tech: Mini Megabytes