Strange Disk Space Issue

Very strange disk space situation.

1TB SSD drive on iMac 27 inch Late 2019

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The following stats show up when I use Get Info inside of Disk Utility.

Volume name : RCR iMac 27 SSD

Volume type : APFS Startup Snapshot

BSD device node : disk1s1s1

Mount point : /

System : macOS 12.4 (21F79)

File system : APFS

Connection : PCI-Express

Device tree path : IODeviceTree:/PCI0@0/RP17@1B/SSD0@0/IONVMeController

Writable : No

Is case-sensitive : No

File system UUID : 1AA26676-1F59-4710-8DEB-7B47D1F7AB2E

Volume capacity : 1,000,240,963,584

Available space (Purgeable + Free) : 480,691,007,538

Purgeable space : 467,320,315,954

Free space : 13,370,691,584

Used space : 15,234,011,136

File count : 366,534

Owners enabled : No

Is encrypted : No

System Integrity Protection supported : Yes

Can be verified : Yes

Can be repaired : Yes

Bootable : Yes

Journaled : No

Media name :

Media type : Generic

Ejectable : No

Solid state : Yes

S.M.A.R.T. status : Not Supported

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The following information shows up when I use standard Get Info From Finder

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As you can see, the Disk Utility info shows about 13.37GM of available space. The Finder Get Info show (correctly) about 480.67GM of available space.

The issue is that I am trying to reinstall Monterrey via Internet Recovery Mode and it fails noting that only 13.37GB of space is available and that is not enough. The Monterrey install fails.

I cannot find any way to release the pursuable space, and have following all Apple suggestions. Deleting trash, etc. Bottom line is that I am only using about 1/2 of the SSD drive space.

There are likely some other problems as I have had several apps crashing lately and got a message about "Hash Mismatch detected."

Anyone have any ideas here. I can reformat the SSD disk and reinstall but that is a lot of work I would like to avoid. It is possible that I have a hardware problem.

Thanks for any thoughts.

RR