Do I need OS 9 System Folder and Applications?

I am running low on space and am looking at things to remove from my internal hard drive. Is there any risk to removing the OS 9 folders? I have a 200G external harddrive with lots of space. Is moving the folders there a better option than deleting them or does moving them cause problems also if I might need them in the future?
Thanks,
Sande
powerbook   Mac OS X (10.3.9)   12 in

Hi, asinhk. The disk space you'd regain by deleting your OS 9 System Folder and Applications Folder is likely to be less, maybe far less, than one gigabyte. Check the sizes of those folders using the Finder's Get Info command to see how much space you're actually talking about.
If you have no need at all to run Classic applications — you never do so in your day-to-day work, and you have no old, stored documents that you'll ever need to access in Classic mode — then you can safely delete OS 9 and its applications. It would also be OK to transfer the two major OS 9-related folders to your external drive, if you do need to run Classic sometimes, and if you'll have the external drive connected to the Powerbook whenever you need to use Classic. If you do that, you'll need to re-specify the new location of the System Folder to use for Classic in the Classic pane of System Preferences.
But ultimately, if you are so pressed for hard drive space that removing OS 9 from your internal drive is going to make any significant difference, then you'll need a new, larger internal hard drive very soon even if you do delete OS 9. If you ever need to perform an Archive & Install of OS X, or you ever want to burn a DVD, you'll need at least 5GB of available space on your internal hard drive to do so. If you can't free up that much space on your HD right now without making agonizing choices about what to keep, you already need a bigger drive.

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    OS X Mountain Lion- Reinstall OS X
    OS X Lion- Reinstall Mac OS X
         Note: You will need an active Internet connection. I suggest using Ethernet
                     if possible because it is three times faster than wireless.

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