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What's taking so much space on my HD?

My machine came with a 120GB drive. I"m upgrading HD to 320Gb, I plan on using super duper to clone the drive etc., etc. Now, I previously had problems creating partitions larger than 3Gb with my current drive although the machine has almost 70Gb of free space. I understand that once i clone the drive all the free space on my new drive should be contigous thus eliminating the partition problem. My question is that how can I see what's taking up the 50Gb on my drive in order to do some "cleaning" before i clone the drive? My machine has barely been used and I dont see why I have used 50GB of space, My Itunes comprises of 4Gb and the rest is native apps with the exception of maybe 4 small 3rd party apps. Can u please recommend any software that I can use to see what is taking up space on my drive before I clone?

Answered! View the answer I have this problem too

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I haven't tried it yet, but this free tool appears to do what you need, i.e. graphically depict the contents of your drive:

http://grandperspectiv.sourceforge.net/

This one is also pretty cool:

http://www.omnigroup.com/applications/om...

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I'LL try the second one, Grandperspective is a little complex, hard to read. thanx RDK.

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I use Grandperspective which was mentioned above. there's another similar tool you can try called WhatSize http://www.id-design.com/software/whatsi...

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I've used this in the past

http://wheresthefreespace.com/

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Thanx Johan

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Also, a 120GB Drive formats to about 100GB, I have the same problem in my mac mini, where it only has about 75GB free after both os's installed on 2 partitions. 120GB drives only show up as 100GB or so because when they manufacture a drive, it has 120,000,000,000 Bytes, this however isn't 120GB, 1024 Bytes makes a Kilobyte, 1024KB makes a Megabyte, and 1024MB makes a Gigabyte, and 1024GB makes a terabyte, so drive manufactures expect people to think that data storage is base-10 like the number system and the metric system, however it isn't.

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Majesty will be eternally grateful.
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