What can I delete in the library folder without messing up the OS?

My library folders (Hard Drive and profiles) are getting really large. How do I know what I can delete without messing up the OS or application operations?

Wow!
I will skirt the terms of use to say that it is a small world - especially considering the size of Johnson Creek! I live a bit south of your street - off County "B."
As you might guess, yesterday was a brats and beer day (in addition to remembering people who served).
Barry
P.S. The other poster (noondaywitch) lives in a place in the UK where an old friend of mine also resides. Small world, indeed.

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Once the iDVD is burned, what can I delete to free up space without compromising the integrity of the dvd

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Hmmm, did you actually burn a DVD from the project?

What can I delete from the phone memory?

I have virtually nothing installed on c: (the phone) except for the nokia diagnostic thing.
But I have less then 800k free memory left.
When I didi the last system update I had 25mb free and since then I have applied a Ovi Maps, Contact and Music update all done through the phones SW update thing.
I have a couple of file explore apps installed so I can go anywhere on the phone memory and I was just wondering if there is anything I can safely delete.
I have a 5230 and I have done the usual of getting rid of the data inside the browser.

The only thing I have not done is delete some of the preinstalled apps and reinstall them using Ovi store to get them onto my memory card.
Looking at the list of apps this might get me a couple of MB back but what then?
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My new I5 uploaded doubleded all the songs from my library! Please, can somebody help me showing how can I delete just the songs that was doubled?

Hi there everybody,
My new Iphone 5 uploaded doubleded all the songs from my library! Please, can somebody help me showing how can I delete just the songs that was doubled?
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When you say "account," do you mean your iTunes library, because your iTunes library is what is on your computer? Your iTunes library does not have an email address. An account that is related to iTunes is your Apple ID (which is an email address) and you use it as your user name to sign in to the iTunes Store, to make purchases. Changing your Apple ID will not make songs disappear from your computer's iTunes library.
If you had an Apple ID and used it to make song purchases from the iTunes Store, and then started using a different Apple ID, you should be able to re-download the songs purchased with the old Apple ID. In iTunes, sign in to the iTunes Store using your OLD Apple ID (and password). That may not be your current email address, but Apple uses it as your user name, so it does not matter.
On the iTunes Store Home screen, click on Purchased under QUICK LINKS. This takes you do the Purchased screen, where you can re-download previous song purchases (for that Apple ID) at no cost.
NOTE: If those song purchases are from more than a few years ago, you may also need to authorize your computer to play (and sync) songs for your old Apple ID.
For songs that were not purchased from the iTunes Store, if they are also gone, you cannot get them back unless you have a backup (or they are still loaded on your old iPod).
If that's not what you mean by "changed the email address on my account," please post back with more details.

What can I delete from Extensions and System folder?

I just installed System 10.4 bundled with Classic Mode on my eMac. There seemed to be a lot of things that got installed that I won't need, such as: printer drivers, iChat, Quicken and World Book Encyclopedia. What can I safely delete from the Extensions folder that will not affect the operating system, keeping in that want to run on programs in Classic Mode? Is there anything else I can delete along these lines that will free up hard drive space? Is there anything I can safely delete from the System Folder?
I chose the Archive and install for installation. It says it created a "Previous System Folder". Can I delete this Previous System Folder to make it run faster?

A standard install loads you up with a pile of unneeded printer drivers, foreign fonts and foreign language support. Did you do the optional install that allows you to omit these space-eaters? If not, as this is a new install, you might consider reinstalling and exercising the optional or custom install options.
Back in the OS9 and earlier days when hard drives were tiny and RAM was expensive, it was a real help to rid one's self of the extra unused extensions. They had "open" and easily understood file names making it a no-brainer to drag those extensions to an "unused extension" folder outside the System folder.
Of all the eMacs made there were only two basic logic board architectures. The first would accommodate up to 1 GB RAM and the second could handle a total of 2GB RAM. Do "About this Mac" from your Apple menu and, in the resulting window, click the "More Info..." button to launch System Profiler.
In Profiler's first screen you can tell which architecture you have. The second line in OS 104 is "Machine Model" followed by a code:
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code "PowerMac6,4 --that later and desirable USB 2.0 logic board that can do 2GB RAM.
If you have a 4,4 the RAM for that model is listed here:
http://eshop.macsales.com/MyOWC/Upgrades.cfm?sort=pop&model=146&type=Memory
"PC-133" RAM is preferred in 4,4 eMacs for best function.
The same vendor has RAM for the 6,4 here:
http://eshop.macsales.com/MyOWC/Upgrades.cfm?sort=pop&model=223&type=Memory
I've bought 90 percent of my RAM from this vendor for the last decade and can vouch for their product quality and customer service.
The point is that maxxing out your RAM is not expensive and saves you a lot of grief from deleting some file with a cryptic OSX name that the computer really needs.

I have a Bootcamp partition on my Imac with Mavericks which I can't delete because the Partition Layout is greyed out and is stuck on 'Current'. What can I do?

I have a Bootcamp partition on my Imac with Mavericks which I can't delete because the Partition Layout in Disk Utility is greyed out and is stuck on 'Current'. What can I do? I was trying to install Windows 8.1 but apparently, this is not yet possible.
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My friend synced a video to my ipod but it earased all my data on my ipod,but I can't figure out how to load my old library back without deleting the movie. My friend shares a family account so she can't tell me the password. How can i get my old library back without deleting the movie?

Linnwarner wrote:
She does have the right because she bought the movie.
Not true at all.
You only buy the right to your own personal use.
You do NOT have the right to distribute to others.
This is illegal. There is no doubt about it

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Well you can sync your iPod/iPhone to yur computer or laptop then take the photos off of your iPod like taking photos of of a SD card (from a normal camera) or off of a USB..! Good Luck. plz tick this saying This solved my question if it helps you.

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Thanks Hélème

Helene,
Both of those things you pointed out are mere *metadata*.
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New User created and Test User deleted... I hope this helps.

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If you start deleting things in hidden system folders, or in an /Library folder you may very well mess up something.
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C:\ProgramData\Apple Computer\iTunes
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This solved my problem.
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What can I delete in the library folder without messing up the OS?

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