1. Network, Local, and Portable Storage Media Computer Literacy for Education Majors

2. 2 What is Storage Media? Media Media Plural of Medium. Plural of Medium. Material used for storage of information. Magnetic disks, tapes, and optical disks, and portable USB drives are all examples of storage media. Material used for storage of information. Magnetic disks, tapes, and optical disks, and portable USB drives are all examples of storage media. In short, any of the many and various devices used to store digital files can be called storage media. In short, any of the many and various devices used to store digital files can be called storage media.

3. 3 How is Data Measured Data is saved in digital files that are measured in bytes. Data is saved in digital files that are measured in bytes. 1,000 bytes = 1 kilobyte 1,000 bytes = 1 kilobyte Kilo means 1 thousand (1,000) Kilo means 1 thousand (1,000) 1,000 kilobytes = 1 megabyte 1,000 kilobytes = 1 megabyte Mega means 1 million ( 1,000,000) Mega means 1 million ( 1,000,000) 1,000 megabytes = 1 gigabyte 1,000 megabytes = 1 gigabyte Giga means one 1 billion (1,000,000,000) Giga means one 1 billion (1,000,000,000)

4. 4 Lets Do Some Arithmetic Suppose I have a storage media device that has the capability to store 1.4 megabytes Suppose I have a storage media device that has the capability to store 1.4 megabytes How many files of 25 kilobytes could I store in that storage media device? How many files of 25 kilobytes could I store in that storage media device? The answer is 56 The answer is 56 I could store 56 files of 25 kilobytes in a 1.4 megabyte storage media device I could store 56 files of 25 kilobytes in a 1.4 megabyte storage media device

5. 5 How Did We Get That Answer? Simple Arithmetic is how. Simple Arithmetic is how. Our file is 25 kilobytes Our file is 25 kilobytes Spoken as 25 kay Spoken as 25 kay Written as 25k Written as 25k Our media is 1.4 megabytes Our media is 1.4 megabytes Spoken as 1.4 meg Spoken as 1.4 meg Written as 1.4 meg Written as 1.4 meg First we convert 1.4 megabytes to kilobytes First we convert 1.4 megabytes to kilobytes We know that 1 meg is 1,000k We know that 1 meg is 1,000k Therefore 1.4 meg is 1,400k Therefore 1.4 meg is 1,400k Then we divide 1,400 by 25 Then we divide 1,400 by 25 1,400k ÷ 25k = 56 1,400k ÷ 25k = 56 We can store 56 of those 25k files in a 1.4 meg device We can store 56 of those 25k files in a 1.4 meg device

6. 6 Lets Try It Again We have the same 25k file but now we have a 100 meg storage media device. We have the same 25k file but now we have a 100 meg storage media device. 100 meg = 100,000k 100 meg = 100,000k 100,000k ÷ 25k = 4,000 100,000k ÷ 25k = 4,000 We could store 4,000 of those 25k files in a 100 meg storage media device We could store 4,000 of those 25k files in a 100 meg storage media device

7. 7 Lets Try It Again,,, again Same 25k file but now we have a 250 meg storage media device. Same 25k file but now we have a 250 meg storage media device. 250 meg = 250,000k 250 meg = 250,000k 250,000k ÷ 25k = 10,000 250,000k ÷ 25k = 10,000 We could store 10,000 of those 25k files in a 100 meg storage media device We could store 10,000 of those 25k files in a 100 meg storage media device

8. 8 Lets Try It Again,,, On Your Own Same 25k file but now we have a 650 meg storage media device. Same 25k file but now we have a 650 meg storage media device. 650 meg = _______ 650 meg = _______ _______ ÷ ____ = _______ _______ ÷ ____ = _______ We could store ______ of those 25k files in a 100 meg storage media device We could store ______ of those 25k files in a 100 meg storage media device

9. 9 Lets Try It Again,,, On Your Own Same 25k file but now we have a 650 meg storage media device. Same 25k file but now we have a 650 meg storage media device. 650 meg = 650,000k 650 meg = 650,000k 650,000k ÷ 25k = 26,000 650,000k ÷ 25k = 26,000 We could store 26,000 of those 25k files in a 100 meg storage media device We could store 26,000 of those 25k files in a 100 meg storage media device

10. 10 The Answer Is,,,

11. 11 Why Learn This? You must be familiar enough with file sizes and the capacity of the different storage media devices to be able to make these calculations in your head,,, quickly! You must be familiar enough with file sizes and the capacity of the different storage media devices to be able to make these calculations in your head,,, quickly! This is something you will deal with on a daily basis as you go through this course and use computers to create your papers and other computer based projects This is something you will deal with on a daily basis as you go through this course and use computers to create your papers and other computer based projects Get comfortable with these figures,,, Get comfortable with these figures,,,

12. 12 A Practical Example A popular web-based e-mail service allows a maximum attachment file size of 1,000k A popular web-based e-mail service allows a maximum attachment file size of 1,000k My camera takes pictures with a file size of approximately 1.2 meg for each picture. My camera takes pictures with a file size of approximately 1.2 meg for each picture. How many pictures can I attach to an e-mail? How many pictures can I attach to an e-mail?

13. 13 The Arithmetic 1,000k = 1 meg 1,000k = 1 meg 1.2 meg is larger than 1 meg 1.2 meg is larger than 1 meg I cant send my pictures through that e-mail service I cant send my pictures through that e-mail service

14. 14 Another Practical Example You are designing a website with pictures. You are designing a website with pictures. You know that people who have slow telephone modems can only download approximately 4 meg per second. You know that people who have slow telephone modems can only download approximately 4 meg per second. If you do not want your pictures to take more than 10 seconds to download,,, If you do not want your pictures to take more than 10 seconds to download,,, What is the maximum file size for your pictures? What is the maximum file size for your pictures?

15. 15 The Arithmetic 4k per second multiplied by 10 seconds 4k per second multiplied by 10 seconds equals 40k maximum file size. equals 40k maximum file size. How long would it take to download a 1.2 meg picture from my camera How long would it take to download a 1.2 meg picture from my camera 1.2 meg = 1,200k 1.2 meg = 1,200k 1,200k ÷ 4k per second = 300 seconds1,200k ÷ 4k per second = 300 seconds 300 seconds = 5 minutes 300 seconds = 5 minutes

16. 16 Lets Do One More Example MP3 audio files have a file size of approximately 5 meg MP3 audio files have a file size of approximately 5 meg How many mp3s can I store in a player that has a storage capacity of 20 gigabytes? How many mp3s can I store in a player that has a storage capacity of 20 gigabytes?

17. 17 The Arithmetic 20 gigabytes (20 gig) = 20,000 meg 20 gigabytes (20 gig) = 20,000 meg 20,000 meg ÷ 5 meg = 4,000 20,000 meg ÷ 5 meg = 4,000

18. 18 Three Types of Storage Media Local Storage Media Local Storage Media The hard drive in your computer. The hard drive in your computer. Network Storage Media Network Storage Media At OSU, it is your Student H-drive. At OSU, it is your Student H-drive. Portable Storage Media Portable Storage Media 3 ½ floppy disks, ZIP disks, USB disks, and CDR disks. 3 ½ floppy disks, ZIP disks, USB disks, and CDR disks.

19. 19 Local Storage Media Local storage media refers to the permanent storage memory inside your computer. Local storage media refers to the permanent storage memory inside your computer. Typically it is the C-drive. Typically it is the C-drive. The average C-drive has a storage capacity of approximately 40 gigabytes The average C-drive has a storage capacity of approximately 40 gigabytes

20. 20 Network Storage Media At OSU, it is your Student H-drive At OSU, it is your Student H-drive Your Student H-Drive has a storage capacity of exactly 500 meg Your Student H-Drive has a storage capacity of exactly 500 meg This should easily hold every document you will create for your Bachelors Degree This should easily hold every document you will create for your Bachelors Degree

21. 21 Portable Storage Media 3 ½ floppy disks 3 ½ floppy disks 1.44 megabytes 1.44 megabytes ZIP disks ZIP disks 100 or 250 megabytes 100 or 250 megabytes USB drives USB drives 32, 64, 128, 256, or 512 megabytes 32, 64, 128, 256, or 512 megabytes CDR disks CDR disks 650 or 700 megabytes 650 or 700 megabytes

22. 22 Practice Your Knowledge Go to: http://www.electronicportfolio.org/day04/04.htm Go to: http://www.electronicportfolio.org/day04/04.htm http://www.electronicportfolio.org/day04/04.htm View the presentation on your own and then click the link for Practice the Content View the presentation on your own and then click the link for Practice the Content After you are confident that you have mastered this lesson click the Assignment link After you are confident that you have mastered this lesson click the Assignment link After you have read the assignment for this lesson, click the Take the Evaluation link After you have read the assignment for this lesson, click the Take the Evaluation link

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