When I back up on my exertnal HD drive with time machine can I erase what on my computer HD for more space?

When I back up files on my exertnal HD drive with time machine can I erase what's on my Mac HD for space without losing what's on external HD?

If the data is valuable to you, redundant backups are essential.  Time Machine is an excellent vehicle when you have to restore data that no longer exists on your internal HDD.
Mende1's suggestion of using Carbon Copy Cloner is excellent because it gives yous a HDD that is 'ready to go' should your internal HDD fail (as all HDDs eventually will). 
For example, I have 5 copies of my iTunes folder, one each on three MBPs, on a HDD devoted strictly to iTunes and Time Machine (this does not include the iPod).  One may view this as excessive but since I have over 100 GB in this application, I am very comfortable with this.
I advocate that the best backup strategy is Time machine combined with a boot HDD and a third HDD for the most important user data.  If there is non essential data, the you may certainly compromise and use just Time Machine.
Ciao.

Similar Messages

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    redrubi1234 wrote:
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    It is recommended that Time Machine has it's Own Dedicated Drive.
    - Corza - wrote:
    Can I use it with time machine and then use it to store stuff on as well??..
    See here  >  Can I use my TM disk for other stuff?
    From Here  >  http://pondini.org/TM/FAQ.html

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  • Had to wipe my drive so I could do a clean install of snow leopard Now I look every where on how to move bookmarks, address book and I cal settings.  I have them back up on a external drive with Time machine but can not move, copy or restore my old sett d

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    Use migration assistant to move your files.  http://support.apple.com/kb/HT4889

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    I am backing up my computer to an external hard drive using Time Machine.  It has been at 288.91 "used" for a while... should I just let it ride?  It's been going for about 7 hours now

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  • I restored my hard drive with time machine but when I log in I get "home folder protected by fire vault and needs to be repaired. But I can't get past the regular log

    I restored my hard drive with time machine but when I log in I get "home folder protected by fire vault and needs to be repaired. But I can't get past the regular log

    Maybe you might find some info to the right>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

  • Backing up an encrypted drive with Time Machine under Snow Leopard

    In a nutshell, my question is “Can I back up an encrypted drive using Time Machine under Snow Leopard, and if so, how do I access its data from a previous day?”
    I have a 1Tb USB drive connected to my MacBook, which runs Snow Leopard. The drive is formatted as Mac OS Extended (Journaled). This drive is included in the drives that Time Machine backs up. I used Disk Utility to create an encrypted drive on the USB drive (998Gb), also formatted as Mac OS Extended (Journaled). The encrypted drive is not on TimeMachine’s list of excluded files/drives.
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    Having received a bunch of views but no replies over the last 5 days, I decided to venture into my local Apple store and ask this same question. The response I got from the geniuses was that you can't get a reliable back-up of an encrypted drive using Time Machine under Snow Leopard. So, my only alternative is to copy the encrypted drive's contents elsewhere, unencrypt the drive, and then copy the contents back. This is what I expected, but not what I wanted to hear.

  • Trouble backing up external drive with time machine

    I have a small USB stick that I use to store important documents but documents that I don't access very often.  I have an additional 500 GB hard drive that I use for backing up with Time Machine.  I want Time Machine to backup both my internal hard drive (Macbook Air 2011 Lion) as well as the small USB stick. I've searched the forum and discovered that I needed to reformat the USB stick, which I did (it is now Mac OS Extended).  The USB now appears in the list of excluded drives in Time Machine preferences, which I removed.  Thinking that Time Machine would be backing up my USB stick now, I backed up and then turned the computer off.  The next day, I looked at the external drive, and it didn't seem to have a backup of the USB.  I entered Time Machine and the USB is "greyed out" which means it wasn't backed up. I've retried backing up several times by including the USB in Time Machien preferences, but it seems that when I click "save" it doesn't actually save because when I open Preferences up again, the USB stick is in the list of excluded items again.  Have I done something wrong?  Any imput would be greatly appreciated.

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  • Backing up a shared drive with Time Machine

    I've searched all over the place and refuse to believe I'm the only person in this situation but I can't find a solution to my problem!
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    jameskoster wrote:
    As I write this I'm thinking that maybe Time Machine isn't the best way
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    check out ChronoSync.
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  • Accessing back-ups on external hard-drive with Time Machine.

    Hi guys,
    I hope someone can help me with this problem. I am a novice at this so please be patient and forgive my ignorance.
    I backed up the internal hard-drive of my '06 iMac onto an external Iomega 500GB hard-drive using Time Machine.
    A couple of weeks later the internal hard-drive of my iMac fried and I got the " grey screen of death ".
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    Sean.

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  • Backing up an external hard drive with time Machine

    I backed up my internal disk with Time Machine, but I can not back up an external drive that I use for my media. I see the drive in the options part of Time Machine system preferences, but the minus sign to take it off of the "do not back up these drives" is blanked out. Any suggestions?

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  • HT201250 Backing up an auxiliary drive with Time Machine

    I have iphoto loaded on an external lacie drive to free up space on my macbook pro.  I use a mybook and time machine to backup my macbook pro, but it won't let me include the Lacie in the backup even though there is plenty of room.  I want to make sure all my photos are backed up.  Any ideas?

    wmiller9 wrote:
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