Network, Local,Network, Local,andand

Portable Storage Media Portable Storage Media

Computer LiteracyComputer Literacyforfor

Education MajorsEducation Majors

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What is Storage Media?What is Storage Media?

MediaMedia Plural of Medium.Plural of Medium. Material used for storage of information.Material used for storage of information.

Magnetic disks, tapes, and optical disks, and Magnetic disks, tapes, and optical disks, and portable USB drives are all examples ofportable USB drives are all examples ofstorage media.storage media.

In short, any of the many and various In short, any of the many and various devices used to store digital files can be devices used to store digital files can be called storage media.called storage media.

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How is Data MeasuredHow is Data Measured Data is saved in digital files that are measured in Data is saved in digital files that are measured in

bytesbytes..

1,000 bytes = 1 kilobyte1,000 bytes = 1 kilobyte Kilo means 1 thousand (1,000)Kilo means 1 thousand (1,000)

1,000 kilobytes = 1 megabyte1,000 kilobytes = 1 megabyte Mega means 1 million ( 1,000,000)Mega means 1 million ( 1,000,000)

1,000 megabytes = 1 gigabyte1,000 megabytes = 1 gigabyte Giga means one 1 billion (1,000,000,000)Giga means one 1 billion (1,000,000,000)

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Let’s Do Some ArithmeticLet’s Do Some Arithmetic

Suppose I have a storage media device Suppose I have a storage media device that has the capability to store 1.4 that has the capability to store 1.4 megabytesmegabytes

How many files of 25 kilobytes could I store in How many files of 25 kilobytes could I store in that storage media device?that storage media device?

The answer is 56The answer is 56 I could store 56 files of 25 kilobytes in a 1.4 I could store 56 files of 25 kilobytes in a 1.4

megabyte storage media devicemegabyte storage media device

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How Did We Get That Answer?How Did We Get That Answer? Simple ArithmeticSimple Arithmetic is how. is how.

Our file is 25 kilobytesOur file is 25 kilobytes Spoken as 25 “kay”Spoken as 25 “kay” Written as 25kWritten as 25k

Our media is 1.4 Our media is 1.4 megabytesmegabytes

Spoken as 1.4 “meg”Spoken as 1.4 “meg” Written as 1.4 megWritten as 1.4 meg

First we convert 1.4 First we convert 1.4 megabytes to kilobytes megabytes to kilobytes

We know thatWe know that1 meg is 1,000k1 meg is 1,000k

ThereforeTherefore1.4 meg is 1,400k1.4 meg is 1,400k

Then we divide 1,400 by 25Then we divide 1,400 by 25

1,400k 1,400k ÷ 25k = 56÷ 25k = 56

We can store 56 of those We can store 56 of those 25k files in a 1.4 meg 25k files in a 1.4 meg devicedevice

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Let’s Try It AgainLet’s Try It Again

We have the same 25k file but now we We have the same 25k file but now we have a 100 meg storage media device.have a 100 meg storage media device.

100 meg = 100,000k100 meg = 100,000k 100,000k 100,000k ÷ 25k = 4,000÷ 25k = 4,000

We could store 4,000 of those 25k files in We could store 4,000 of those 25k files in a 100 meg storage media devicea 100 meg storage media device

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Let’s Try It Again,,, againLet’s Try It Again,,, again

Same 25k file but now we have a 250 meg Same 25k file but now we have a 250 meg storage media device.storage media device.

250 meg = 250,000k250 meg = 250,000k 250,000k 250,000k ÷ 25k = 10,000÷ 25k = 10,000

We could store 10,000 of those 25k files in We could store 10,000 of those 25k files in a 100 meg storage media devicea 100 meg storage media device

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Let’s Try It Again,,, On Your OwnLet’s Try It Again,,, On Your Own

Same 25k file but now we have a 650 meg Same 25k file but now we have a 650 meg storage media device.storage media device.

650 meg = _______650 meg = _______ _______ _______ ÷ ____ = _______÷ ____ = _______

We could store ______ of those 25k files We could store ______ of those 25k files in a 100 meg storage media devicein a 100 meg storage media device

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Let’s Try It Again,,, On Your OwnLet’s Try It Again,,, On Your Own

Same 25k file but now we have a 650 meg Same 25k file but now we have a 650 meg storage media device.storage media device.

650 meg = 650,000k650 meg = 650,000k 650,000k 650,000k ÷ 25k = 26,000÷ 25k = 26,000

We could store 26,000 of those 25k files in We could store 26,000 of those 25k files in a 100 meg storage media devicea 100 meg storage media device

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The Answer Is,,,The Answer Is,,,

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Why Learn This?Why Learn This?

You must be familiar enough with file sizes and You must be familiar enough with file sizes and the capacity of the different storage media the capacity of the different storage media devices to be able to make these calculations in devices to be able to make these calculations in your head,,, quickly!your head,,, quickly!

This is something you will deal with on a daily This is something you will deal with on a daily basis as you go through this course and use basis as you go through this course and use computers to create your papers and other computers to create your papers and other computer based projectscomputer based projects

Get comfortable with these figures,,,Get comfortable with these figures,,,

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A Practical ExampleA Practical Example

A popular web-based e-mail service allows A popular web-based e-mail service allows a maximum attachment file size of 1,000ka maximum attachment file size of 1,000k

My camera takes pictures with a file size of My camera takes pictures with a file size of approximately 1.2 meg for each picture.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?

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The ArithmeticThe Arithmetic

1,000k = 1 meg1,000k = 1 meg

1.2 meg is larger than 1 meg1.2 meg is larger than 1 meg

I can’t send my pictures through thatI can’t send my pictures through thate-mail servicee-mail service

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Another Practical ExampleAnother Practical Example

You are designing a website with pictures.You are designing a website with pictures.

You know that people who have slow You know that people who have slow telephone modems can only download telephone modems can only download approximately 4 meg per second.approximately 4 meg per second.

If you do not want your pictures to take more If you do not want your pictures to take more than 10 seconds to download,,,than 10 seconds to download,,, What is the maximum file size for your pictures?What is the maximum file size for your pictures?

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The ArithmeticThe Arithmetic

4k per second multiplied by 10 seconds4k per second multiplied by 10 seconds equals equals 40k maximum file size40k maximum file size..

How long would it take to download aHow long would it take to download a1.2 meg picture from my camera1.2 meg picture from my camera

1.2 meg = 1,200k1.2 meg = 1,200k• 1,200k 1,200k ÷ 4k per second = 300 seconds÷ 4k per second = 300 seconds

300 seconds = 5 minutes300 seconds = 5 minutes

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Let’s Do One More ExampleLet’s Do One More Example

MP3 audio files have a file size of MP3 audio files have a file size of approximately 5 megapproximately 5 meg

How many mp3’s can I store in a player that How many mp3’s can I store in a player that has a storage capacity of 20 gigabytes?has a storage capacity of 20 gigabytes?

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The ArithmeticThe Arithmetic

20 gigabytes (20 gig) = 20,000 meg20 gigabytes (20 gig) = 20,000 meg

20,000 meg 20,000 meg ÷ 5 meg = 4,000÷ 5 meg = 4,000

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Three Types of Storage MediaThree Types of Storage Media

Local Storage MediaLocal Storage Media The hard drive in your computer.The hard drive in your computer.

Network Storage MediaNetwork Storage Media At OSU, it is your Student H-drive.At OSU, it is your Student H-drive.

Portable Storage MediaPortable Storage Media 3 ½ floppy disks, ZIP disks, USB disks,3 ½ floppy disks, ZIP disks, USB disks,

and CDR disks.and CDR disks.

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Local Storage MediaLocal Storage Media

Local storage media refers to the Local storage media refers to the permanent storage memory inside your permanent storage memory inside your computer.computer.

Typically it is the C-drive.Typically it is the C-drive.

The average C-drive has a storage The average C-drive has a storage capacity of approximately 40 gigabytes capacity of approximately 40 gigabytes

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Network Storage MediaNetwork Storage Media

At OSU, it is your Student H-driveAt OSU, it is your Student H-drive

Your Student H-Drive has a storage Your Student H-Drive has a storage capacity of exactly 500 megcapacity of exactly 500 meg

This should easily hold every document This should easily hold every document you will create for your Bachelor’s Degreeyou will create for your Bachelor’s Degree

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Portable Storage MediaPortable Storage Media

3 ½ floppy disks3 ½ floppy disks 1.44 megabytes1.44 megabytes

ZIP disksZIP disks 100 or 250 megabytes100 or 250 megabytes

USB drivesUSB drives 32, 64, 128, 256, or 512 megabytes32, 64, 128, 256, or 512 megabytes

CDR disksCDR disks 650 or 700 megabytes650 or 700 megabytes

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Practice Your KnowledgePractice Your Knowledge

Go to: Go to: http://www.electronicportfolio.org/day04/04.htmhttp://www.electronicportfolio.org/day04/04.htm

View the presentation on your own and then View the presentation on your own and then click the link for click the link for Practice the ContentPractice the Content

After you are confident that you have mastered After you are confident that you have mastered this lesson click the this lesson click the AssignmentAssignment link link

After you have read the assignment for this After you have read the assignment for this lesson, click the lesson, click the Take the EvaluationTake the Evaluation link link

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