My 2TB drive is full and I've got about 800g of files on it?

So I tried to update my 2015 15" MBP from 11.6.1 to 11.6.2 tonight and I discovered that I have no free space.

So I look in Disk Utility and I see that "2 Not Mounted" is using up half of my drive

Then I look at diskutil and see that /System/Volumes/Data is where it all is (maybe)

➜  ~ diskutil apfs list
APFS Containers (4 found)
|
+-- Container disk1 BFD1ED1D-0B21-4F76-BD6A-6AD86A596480
|   ====================================================
|   APFS Container Reference:     disk1
|   Size (Capacity Ceiling):      1920039436288 B (1.9 TB)
|   Capacity In Use By Volumes:   1905017901056 B (1.9 TB) (99.2% used)
|   Capacity Not Allocated:       15021535232 B (15.0 GB) (0.8% free)
|   |
|   +-< Physical Store disk0s2 CB9B9CB0-C2F5-4C02-BF61-6E2AD0498F7A
|   |   -----------------------------------------------------------
|   |   APFS Physical Store Disk:   disk0s2
|   |   Size:                       1920039436288 B (1.9 TB)
|   |
|   +-> Volume disk1s1 ADB16F2C-3A68-3524-ADB6-EE7B6DAFA722
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s1 (Data)
|   |   Name:                      OWC Aura Pro X2 - Data (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         983448141824 B (983.4 GB)
|   |   Sealed:                    No
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s2 C60C3B07-7303-4440-BEEC-7C89F5D9D8CE
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s2 (Preboot)
|   |   Name:                      Preboot (Case-insensitive)
|   |   Mount Point:               /System/Volumes/Preboot
|   |   Capacity Consumed:         1347420160 B (1.3 GB)
|   |   Sealed:                    No
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s3 229F6437-E74B-4FC2-BA75-7EA34776628A
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s3 (Recovery)
|   |   Name:                      Recovery (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         1718525952 B (1.7 GB)
|   |   Sealed:                    No
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s4 133D559B-7EF9-4A79-9708-C7AE11014527
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s4 (VM)
|   |   Name:                      VM (Case-insensitive)
|   |   Mount Point:               /System/Volumes/VM
|   |   Capacity Consumed:         3233918976 B (3.2 GB)
|   |   Sealed:                    No
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s5 46B25930-D7D9-4AB1-B59F-EE757E3EA332
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s5 (Data)
|   |   Name:                      Macintosh HD - Data (Case-insensitive)
|   |   Mount Point:               /System/Volumes/Data
|   |   Capacity Consumed:         899634757632 B (899.6 GB)
|   |   Sealed:                    No
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s7 E55BB38D-A839-48B4-B070-8AC70F38FE0C
|       ---------------------------------------------------
|       APFS Volume Disk (Role):   disk1s7 (System)
|       Name:                      Macintosh HD (Case-insensitive)
|       Mount Point:               /System/Volumes/Update/mnt1
|       Capacity Consumed:         15333482496 B (15.3 GB)
|       Sealed:                    Broken
|       FileVault:                 No
|       |
|       Snapshot:                  BF7652E2-B5BA-4F9F-9498-D7981827FD94
|       Snapshot Disk:             disk1s7s1
|       Snapshot Mount Point:      /
|       Snapshot Sealed:           Yes
|

I realize that /System/Volumes/Data/Users is where most of it is and I find my home directory there and it exactly matches the size of my real home directory.

sudo du -sh /Users/jrh /System/Volumes/Data/Users/jrh
728G	/Users/jrh
728G	/System/Volumes/Data/Users/jrh

At this point, it looks to me like I have 2 complete copies of my home directory plus a bunch of local time machine backups filling up my disk and I have no idea how to straighten this out.

Can anyone tell me how to recover this space. (I completely blew this system away and reloaded it 2 months ago and I don't want to do that again.)

Thanks