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cbderksen Author

Level 1

10 points

Disk Utility not showing "free space" on external drive

I've got a 4 TB Seagate Drive that I originally partitioned into 1 TB and 3 TB using Mac OS Extended (Journaled). Since then, I decided to reformat the 3 TB partition, and I changed it to APFS format with two volumes and deleted the 1 TB partition. My plan was to merge the 1 TB into the 3 TB partition.

When I mount the drive, Disk Utility only shows the total capacity of the drive as 3 TB:

For some reason, the 1 TB of free space from the deleted partition does not appear in Disk Utility. It also does not have a disk identifier in Terminal:

How do I recover / reclaim / allocate the 1 TB of "free space"? Thanks.

Posted on Jun 21, 2022 1:09 PM

Top-ranking reply

PRP_53

Level 10

92,371 points

Posted on Jun 21, 2022 1:38 PM

If you really what to have the full 4 TB usable again - refer to below.

Reformat the Entire Drive. Then Add your desired Volumes to the APFS formatted drive

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Disk Utility not showing "free space" on external drive

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