File Size

What does file size have to do with me?

Does size matter?

File size impacts every web page on the internet

What are file properties?

Size Location Type Date the file or folder was created. Last modified date

How do you inspect properties?

Right mouse click View details

Experiment

In no longer than 3 minutes Using MS Paint Create a graphic in paint that details some

process (any process).

Output file #1

When complete Save your picture to the desktop in the

default file format for PAINT. .BMP is the default file format. Minimize PAINT program

Inspect the File Properties

Determine the size of your file. Remember Right mouse click Properties

Output file #2 Go Back to Paint

Save your image again to the desktop

But

Choose .JPG file format File / Save As

Inspect the File Properties

Determine the size of your file. Remember Right mouse click Properties

Compare your two files

BMP

Can you tell them apart?

Are they same size?

Which one would you want on your web page?

Is bigger better?

JPG

File Size

Why is file size important? What file formats does the Internet use? Why? What is file compression? Why is file compression needed?

Compression Strategies

It is possible to use save as to change file type and file size

You can also use other programs to compress files

WinZip is the default standard

Zip or Compression Strategies

Big Giant File Paint.bmp

WinZipCompression

Smaller compressed file

Paint.zip

Unzip … or decompress

Big Giant File Paint.bmp

WinZipCompression

Smaller compressed file

Paint.zip

Problem

I created an electronic survey I mailed it to everyone It was too big to mail Mail limit is 500KB What should I do?

PDF is too big - Zip it

Big Giant File Survey.pdf

88k88,000

WinZip Compression

Survey.zip29.8k

29,800

(Remember that on a 28.8Kps modem, it will take on average of 40 seconds to download 100Kb of data.)

File size impact performance

File compression is necessary to move large files

WinZip if a free program you can use.

Is bigger better? Explain.