HT202796: How to install OS X on an external drive connected to your Mac
Learn about How to install OS X on an external drive connected to your MacQ: I can not copy, modify, any file from my Mac to external hard disk, of the seagate brand (fast HDD Portable Drive) I d ... I can not copy, modify, any file from my Mac to external hard disk, of the seagate brand (fast HDD Portable Drive) I don´t know if I need some software to copy and modify files in my hard disk external ? Could you help me please? more
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Aug 10, 2014 11:27 AM in response to fruiz64by Niel,Click on it, choose Get Info from the File menu, and check the format.
If it's formatted as NTFS, reformat it as MS-DOS, exFAT, or Mac OS Extended (Journaled) as desired, or install software such as Paragon NTFS on the computer.
If it's formatted as FAT32 or exFAT, use the Disk Utility's Repair Disk command on it; this may also happen for a flash drive which is about to fail.
If it's formatted as Mac OS Extended, click Authenticate and provide your administrator password, or change the permissions on that specific folder in its Get Info window.
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