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<blockquote data-quote="cawsf90" data-source="post: 1863913" data-attributes="member: 405871">When I try to do a backup with Time Machine I keep receiving the following error. &quot;Two of the disks to back up have the same name. Rename one of the disks named “Macintosh HD - Data”.&quot;I've read where others had the same problem and I did what others did, but it only works for a little while. I spoke with an Apple rep and they walked me through a process. I renamed the second &quot;Macintosh HD-Data&quot; and the back up worked, but only for a little while. It seems that every once in a while it decides to create another Macintosh HD and another Macintosh HD - Data. When it does this Time Machine will not work. The second Macintosh HD and Macintosh HD - Data are the same size as the first ones. Why does it duplicate and hinder me from backing up? I've tried reformatting my Mac to before the problem started and that fixes the issue until I run Time Machine, and then it starts all over again. I've tried using a brand new external hard drive, but it won't let me do a backup as long as the duplicate Macintosh HD and Macintosh HD - Data are still there. Thank you to whomever decides to tackle this with me.</blockquote>

[QUOTE="cawsf90, post: 1863913, member: 405871"] When I try to do a backup with Time Machine I keep receiving the following error. "Two of the disks to back up have the same name. Rename one of the disks named “Macintosh HD - Data”." I've read where others had the same problem and I did what others did, but it only works for a little while. I spoke with an Apple rep and they walked me through a process. I renamed the second "Macintosh HD-Data" and the back up worked, but only for a little while. It seems that every once in a while it decides to create another Macintosh HD and another Macintosh HD - Data. When it does this Time Machine will not work. The second Macintosh HD and Macintosh HD - Data are the same size as the first ones. Why does it duplicate and hinder me from backing up? I've tried reformatting my Mac to before the problem started and that fixes the issue until I run Time Machine, and then it starts all over again. I've tried using a brand new external hard drive, but it won't let me do a backup as long as the duplicate Macintosh HD and Macintosh HD - Data are still there. Thank you to whomever decides to tackle this with me. [/QUOTE]

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