Discover the world of external hard drives for Mac. Compare portable, USB and external hard drive models for office and home and shop online.
Disk Utility User Guide
Discover the world of external hard drives for Mac. Compare portable, USB and external hard drive models for office and home and shop online. I intend to install Avast! Home on to a currently unprotected computer. Rather than go online with that unit, I wish to download Avast! Home with another computer and save to either an external HDD or USB Flash. Then I will load it on to my currently unprotected computer from the HDD or USB Flash.
When you format an internal or external storage device, you can encrypt and protect it with a password. If you encrypt an internal device, you must enter a password to access the device and its information. If you encrypt an external device, you must enter the password when you connect the device to your computer.
Important: If you encrypt an external storage device, you can’t connect it to an AirPort base station for Time Machine backups.
To encrypt and protect the device with a password using Disk Utility, you must erase the device first. If the device contains files you want to save, be sure to copy them to another storage device or volume.
If the device contains any files you want to save, copy them to another storage device or volume.
In the Disk Utility app on your Mac, choose View > Show All Devices.
In the sidebar, select the storage device you want to encrypt.
Click the Erase button in the toolbar.
Enter a name for the volume.
Click the Scheme pop-up menu, then choose GUID Partition Map.
Click the Format pop-up menu, then choose an encrypted file system format.
Enter and verify a password, then click Choose.
To change the password later, select the volume in the sidebar, then choose File > Change Password.
Secure erase options are available only for some types of storage devices. If the Security Options button is not available, you can’t use Disk Utility to perform a secure erase on the storage device.
Writing over the data three times meets the U.S. Department of Energy standard for securely erasing magnetic media. Writing over the data seven times meets the U.S. Department of Defense 5220-22-M standard.
Click Erase, then click Done.
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You can encrypt your data without erasing it by turning on FileVault in the Security & Privacy pane of System Preferences (see Encrypt Mac data with FileVault).
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You can also encrypt a disk and protect it with a password without erasing it. See Encrypt disks or memory cards to protect your Mac information.
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See alsoErase and reformat a storage device in Disk Utility on MacPartition a physical disk in Disk Utility on Mac