Migration Assistant report insufficient storage for Time Machine restore on the same computer

"Migration Assistant report insufficient storage for Time Machine restore on the same computer: Erased my 2019 macbook pro to do a fresh install from time machine. Migration assistant says there is not enough room to do a restore from a time machine backup. It says only 100gb available on a 1tb hard drive. Is there anyway to do a backup from the time machine drive?"

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Using Migration Assistant:

How to see if you can clear this 100%.

1. Boot: in Recovery Mode
2. Enter: Passcode (if prompted)
3. Select: Disk Utility from the top of the window
4. View: the storage bar. Anything shown, such as multiple partitions?
5. Click: Erase
6. Format: Accordingly Use APFS for your model
7. Perform: the new install, and then use Migration Assistant, once set up.

Mike Machian wrote:

Disk utility has an "other volume" taking up 800gb. So I take it somehow the previous install didnt actually delete?

Can you post a screenshot of what disk Utility shows? Be sure to set "the tiny 'View' menu to "show all devices".

This is one I have from another discussion:

more helpful yet would be output of Terminal commend:

diskutil list

might look something like this one:

diskutil list

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 1.0 TB disk0

1: Apple_APFS_ISC ⁨⁩ 524.3 MB disk0s1

2: Apple_APFS ⁨Container disk3⁩ 994.7 GB disk0s2

3: Apple_APFS_Recovery ⁨⁩ 5.4 GB disk0s3

/dev/disk3 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +994.7 GB disk3

Physical Store disk0s2

1: APFS Volume ⁨Macintosh HD⁩ 15.4 GB disk3s1

2: APFS Snapshot ⁨com.apple.os.update-...⁩ 15.4 GB disk3s1s1

3: APFS Volume ⁨Preboot⁩ 623.3 MB disk3s2

4: APFS Volume ⁨Recovery⁩ 822.7 MB disk3s3

5: APFS Volume ⁨Data⁩ 440.1 GB disk3s5

6: APFS Volume ⁨VM⁩ 20.5 KB disk3s6

"Attempted to run it again to see if there was an error message overnight I missed."

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First Aid Button:

While in Recovery Mode, select the drive and the click "First Aid" button on the tip of the window.

"I did an erase and reinstall in recovery mode a second time and this time everything showed up correctly when it was done. Seems to have fixed my hard drive issues (space disappearing no matter how much i cleared of). I had an invalid key order error on disk utility and it now seems to have resolved too. Let's hope everything runs smoother too."

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Excellent job troubleshooting this! Sometimes it takes a second install, and I've been through it myself.

If your drive is 1,000 GB capacity, and you have only 100 GB available, there is something still on that drive.

How did you go about erasing?

What does a Disk Utility say is on there?