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Windows 7: Correct programme & local disk (C) file sizes ?

07 Apr 2016   #1
Arcadian

Windows 7 Home Premium 64bit
 
 
Correct programme & local disk (C) file sizes ?

Whilst definitely not a techie I've just noticed that the size on disk is 1.66 gb and on programme files is 1.65 gb which doesn't sound right at all. Or am I missing something ?

Thanks for any advice..


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07 Apr 2016   #2
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Hello mate I am not really sure of what you are asking? Are you talking about a file on the drive being 1.66GB and the same file in Programs and Features is 1.65GB? If so is this causing any issues??
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07 Apr 2016   #3
Arcadian

Windows 7 Home Premium 64bit
 
 

Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?
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07 Apr 2016   #4
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Wrong straw. Nothing wrong with the small difference.
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07 Apr 2016   #5
LMiller7

Windows 7 Pro 64 bit
 
 

Due to file system overhead the Size on Disk of a folder will usually be larger than the the sum of the files it contains. But if there are compressed files it could be less. This is far more complex than you imagine.
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07 Apr 2016   #6
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by Arcadian View Post
Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?
Did you actually fully remove Firefox? Runnin the uninstaller will not fully remove it.

See: https://support.mozilla.org/en-US/kb...-your-computer

Quote:
To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox installation folder, which is located in one of these locations by default:
C:\Program Files\Mozilla Firefox
C:\Program Files (x86)\Mozilla Firefox
Quote:
The uninstaller does not remove any user data such as history or bookmarks. If you wish to completely remove this data, you must manually delete the Firefox folder containing your user profile:
Click the Start button or press the Windows key to open the Start Menu.
Type %APPDATA% in the search field and press enter to open the hidden Roaming folder.
Open the Mozilla folder.
Delete the Firefox folder.
Alternatively, you can press the Windows key +R to open a Run dialog, type in %APPDATA%\Mozilla\ and click OK to open the Mozilla folder, then delete the Firefox folder.
Suggest backing up bookmarks and extensions first:

MozBackup - Backup tool for Firefox and Thunderbird

More info: Firefox 28 randomly crashing for the last three days
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07 Apr 2016   #7
Arcadian

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by Callender View Post
Quote   Quote: Originally Posted by Arcadian View Post
Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?
Did you actually fully remove Firefox? Runnin the uninstaller will not fully remove it.

See: https://support.mozilla.org/en-US/kb...-your-computer

Quote:
To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox installation folder, which is located in one of these locations by default:
C:\Program Files\Mozilla Firefox
C:\Program Files (x86)\Mozilla Firefox
Quote:
The uninstaller does not remove any user data such as history or bookmarks. If you wish to completely remove this data, you must manually delete the Firefox folder containing your user profile:
Click the Start button or press the Windows key to open the Start Menu.
Type %APPDATA% in the search field and press enter to open the hidden Roaming folder.
Open the Mozilla folder.
Delete the Firefox folder.
Alternatively, you can press the Windows key +R to open a Run dialog, type in %APPDATA%\Mozilla\ and click OK to open the Mozilla folder, then delete the Firefox folder.
Suggest backing up bookmarks and extensions first:

MozBackup - Backup tool for Firefox and Thunderbird

More info: Firefox 28 randomly crashing for the last three days
As far as I know but you might be right, but a friend suggested to try updating the graphics driver which solved the problem so it's now back up to speed again.

Thanks all for the help
My System SpecsSystem Spec
07 Apr 2016   #8
Kari

Microsoft Community Contributor Award Recipient

 

Quote   Quote: Originally Posted by Arcadian View Post
Whilst definitely not a techie I've just noticed that the size on disk is 1.66 gb and on programme files is 1.65 gb which doesn't sound right at all. Or am I missing something ?

Thanks for any advice..
Not advice per se, just something I think is important to understand.

A hard disk partition contains so called allocation units, also known as clusters. The default NT File System (NTFS) allocation unit is 4,096 bytes, 4 KB. One allocation unit can only contain data from one file, using it all. If the file is smaller than 4,096 bytes it uses one allocation unit, a file between 4,097 and 8,192 bytes uses two allocation units, and so on.

An example:
Correct programme & local disk (C) file sizes ?-2016-04-07_21h55_17.png
In screenshot properties of two files. File A is 14,221 bytes. Dividing that with the size of an allocation unit 4,096 bytes shows it needs 3.47 allocation units, which will be rounded to 4 allocation units, therefore the size of the file on disk is 4 times 4,096 = 16,384 bytes.

File B the same: it's just a bit bigger than one allocation unit, therefore it occupies two allocation units.

When formatting a hard disk partition you can of course select the allocation unit size:
Correct programme & local disk (C) file sizes ?-2016-04-07_22h07_14.png
However, there should be no reason to select any other unit size than the default.

This just to explain why there will always be a small difference with the de facto file size and the space it occupies on disk.

Kari


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08 Apr 2016   #9
wasnotwas

W10 Pro x64, W7 Pro x64 in VMware
 
 

@ kari re : cluster size affecting size on disk. In extreme situations eg a large number of v small files, the difference between filesize and size on disk can be massive.

There was an interesting thread on DigitalSpy recently where some dude copied a folder to a usb flash drive, with unexpected results. See pic

Correct programme & local disk (C) file sizes ?-size_on_disk.jpg

cluster size . . .


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