Using efficient video coding formats, a 2 gigabyte memory card can hold around five hours of video content with audio. Compression techniques and settings can increase the amount, but at the cost of video quality.
These formats are created by codecs, or software that codes and decodes a particular type of video or audio as the file is being accessed. Digital cameras, camcorders and cellphones that record raw video use less compressed formats, as higher levels of compression take more time to process. This makes it difficult for small, portable devices to handle both coding into efficient formats quickly and keeping up with the live recording, so less efficient formats are used. Software that converts an .avi video file to an .mkv video file can cut the size in half.Learn More
To format an SD card, connect the SD card to your computer. After backing up the data on the SD card, use the built-in formatting utility on the Windows operating system to format the card.Full Answer >
According to technology review site The Wirecutter, the best brand of SD memory card is SanDisk, as of 2014. The site recommends SanDisk's 32-gigabyte Extreme Plus SD card as the best choice for most users.Full Answer >
An industry standard 74-minute audio compact disk can hold 650 megabytes of data. Other industry standards are the 80-minute, 700 megabyte disks and the 21-minute, 185 megabyte disks. CDs with higher capacity, up to 890 megabytes, exist but don't conform to industry standards and may not work in all readers.Full Answer >
Since 1969, there have been three different size floppy disks for computers, each one with different storage limits. The most recently used disks have a hard plastic cover measuring 3.5 inches by 3.5 inches. It can hold up to 1.44 MB of data.Full Answer >