Formatting external hard disks

What is the best way to reformat an external hard drive from MS-DOS to MacOS?
My disk utility software (macOS 10.5.8) refuses to delete and reformat a new toshiba hd (STOR.E ALU 2,  1 TB).

Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Steps 4-6 are optional but should be used on a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive.

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  • Finder cannot searching for NTFS formatted external hard disk

    MacBookAir,1.8GhZ,Memory 4GB1600 MHz DDR3
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    Barney-15E wrote:
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  • Format External Hard Disk

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    Hi Leiya Lee
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    hello
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    andreasmarx wrote:
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    Get Disk Warrior that will repair the problems without requiring that you reformat the drive - $99.00 on a bootable CD. Will not work on a FAT formatted drive.
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    To reprep the drive:
    Drive Preparation
    1. Open Disk Utility in your Utilities folder.
    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
    4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
    5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
    6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.

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    Hi . I just bought a macbook pro (13.3 inches) . As the internal storage is not much , i am thinking if buying an external hard disk . Please guide which format of external hard disk (fat32 or ntfs) is compatible with my mac.
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    Paul-nz wrote:
    Ouch! Bad day? .
    One other option you might want to consider is exFat.
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    Not again.
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  • I would like to format the external hard disk.  I would like to use it in Mac as well as in Windows.  What format should I do, connect to Macbook Pro? MS-DOS (FAT) or ExFAT ?

    I would like to format the external hard disk.  I need to use it in Mac as well as in Windows.  What format should I do, connect to Macbook Pro?  MS-DOS (FAT) or ExFAT ?

    success1975 wrote:
    Thanks
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    Not one that will matter.
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    Yes, only for Mac
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  • HT201269 I am trying to save memory on my iPhone 4S/ ios6. Can I back up all photos to icloud and the external hard disk I normally use for photos? If I then delete photos from the iPhone do the get deleted on iCloud?

    I am trying to save memory on my iPhone 4S/ ios6.
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