From punch cards to holograms, there has been drastic change in the data storage that powers the digital devices such as computers, smartphones and computers. In 1745, punch cards were initially used to store important information and magnetic tape has been evolved in 1950’s with increased data storing capacity.
Cassette tape, removable hard disk drive, zip drive, compact disc, punched type were all of big size making it difficult for the user to carry, but in the year 2000, SD card and USB flash drive were invented for the convenience of the computer users. These tiny data storing devices have allowed the users to store large amount of data. In 2007, cloud technology has come into existence that permits a computer user within cloud to access information of other users without using any device.
Here is a brief break down of the different household disc storage devices:
- In general, the CD-Rom is of 120 mm in diameter.
- CD’s are divided into different chunks and each chunk is of 2352 bytes that are even referred as sectors.
- A single layered DVD is capable of storing 4.78 GB of data and the double layered or double sided DVD’s can store up to 17 GB of information.
- It is divided into various chunks and each chunk is of 2048 bytes.
- A double layered Blu-Ray can store information up to 50 GB and you can store a SD video of length 23 hours on a 50 GB Blu-Ray disc.