Mac only reading part of my external hard drive

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Level 1

17 points

Mac only reading part of my external hard drive

Hi Guys,

I'm having problems with my external hard drive when i connect it to my MacBook Pro. Recent it was not mounting the drive so i had to reformat it and now its mounted but its only reading 100gb of my 1TB.

I looks like there is a Partition on the drive but when i try to remove the partition, it give me an error as per below:

Please help me to get access to the remaining space in my external hard drive.

MacBook Pro (13-inch Mid 2012), macOS High Sierra (10.13.5)

Posted on Jul 25, 2018 3:02 AM

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Answer 1

Best reply

farrukhdaad Author

Level 1

17 points

Jul 29, 2018 12:36 AM in response to Eric Root

Hi Eric,

I found out what i had to do. I recently update my software to High Sierra but the external hard drive was formatted to the old Mac OS so i had to simply convert the drive to APFS.

Thanks for your help though.

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Answer 2

farrukhdaad Author

Level 1

17 points

Jul 29, 2018 12:26 AM in response to Eric Root

Hi Eric,

I reformatted the drive using the eras bottom on top. I first formatted the drive as ExFAT because i was told that this way it would work on both, Windows and Mac. I think thats what caused it to bring up this issue. Now i have reformatted it again Mac OS Extended (Journaled) but the issue didn't get fixed.

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Answer 3

Barney-15E

Level 10

112,890 points

Jul 29, 2018 5:35 AM in response to farrukhdaad

I found out what i had to do. I recently update my software to High Sierra but the external hard drive was formatted to the old Mac OS so i had to simply convert the drive to APFS.

That was not the problem.

At this point, you don't want to run APFS on an external, especially a spinning hard drive. Maybe when Apple sorts it out, but it isn't optimized for spinning hard drives, and it doesn't offer any real benefits over HFS+.

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Answer 4

Eric Root

Level 10

684,057 points

Jul 25, 2018 7:24 AM in response to farrukhdaad

When you reformatted the drive, did you erase/reformat the drive (top) or the partition? If you did the partition, try erasing/reformatting the drive.

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Answer 5

Eric Root

Level 10

684,057 points

Jul 29, 2018 7:17 AM in response to farrukhdaad

You are welcome. Is the drive working properly formatted as APFS?

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Mac only reading part of my external hard drive

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