Did you get permissions on WindowsImageBackup & each of the 5 folders inside before looking at its Properties for size? Mine is 92 GB but it has 3 separate & distinct computername folders inside, So, I had to get permissions on 16 folders total before it would say 92 GB...

I copied that from one 2TB external HDD to another. It was USB 3.0 to USB 2.0 & took about 40 minutes at a steady 30 MBs. The HDD was empty to start except it did have 3 shadow copies from having made images to it in the past. They have stayed although the WindowsImageBackup folders were deleted...
X:\Sources>dir "F:\System Volume Information" /a /s
Volume in drive F is Seagate 2TB Slim Blue
Volume Serial Number is E69A-0E2A
Directory of F:\System Volume Information
08/18/2021 12:12 AM <DIR> .
08/18/2021 12:12 AM <DIR> ..
08/18/2021 12:12 AM <DIR> EDP
05/19/2019 06:56 PM 76 IndexerVolumeGuid
11/23/2020 11:08 PM 20,480 tracking.log
05/19/2019 06:56 PM 12 WPSettings.dat
03/06/2021 06:11 PM 12,441,288,704 {22ab8690-308f-11eb-b1f2-74e6e2074932}{3808876b-c176-4e48-b7ae-04046e6cc752}
11/23/2020 10:30 PM 65,536 {3808876b-c176-4e48-b7ae-04046e6cc752}
11/27/2020 08:03 PM 4,297,162,752 {4da27a22-2dfb-11eb-b1ef-74e6e2074932}{3808876b-c176-4e48-b7ae-04046e6cc752}
03/06/2021 06:11 PM 24,998,051,840 {55973e07-7e20-11eb-b207-74e6e2074932}{3808876b-c176-4e48-b7ae-04046e6cc752}
7 File(s) 41,736,589,400 bytes
Directory of F:\System Volume Information\EDP
08/18/2021 12:12 AM <DIR> .
08/18/2021 12:12 AM <DIR> ..
08/18/2021 12:12 AM <DIR> Recovery
0 File(s) 0 bytes
Directory of F:\System Volume Information\EDP\Recovery
08/18/2021 12:12 AM <DIR> .
08/18/2021 12:12 AM <DIR> ..
0 File(s) 0 bytes
Total Files Listed:
7 File(s) 41,736,589,400 bytes
8 Dir(s) 1,859,625,807,872 bytes free
That can only be seen in the recovery environment (Shift+Restart). It won't show up after a boot. The space taken by the System Volume Information folder is carved off the partition (I'm unsure when) & is not reported as used or available space by File Explorer. It belongs to the system overhead. But it can be seen with "VSSAdmin List Shadows". It was F: in the recovery environment, but it is G: in Windows...
Contents of shadow copy set ID: {de17858c-05f5-4b92-9117-a825e1e4fb56}
Contained 1 shadow copies at creation time: 11/24/2020 2:30:34 AM
Shadow Copy ID: {c3a13512-14d5-4337-ab2d-9a84e13d6344}
Original Volume: **(G:)**\\?\Volume{dbd87d1a-29ab-4645-b77d-8742584e1bda}\
Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy18
Originating Machine: PCRsComputer
Service Machine: PCRsComputer
Provider: 'Microsoft Software Shadow Copy provider 1.0'
Type: DataVolumeRollback
Attributes: Persistent, No auto release, No writers, Differential
Contents of shadow copy set ID: {a8137b04-59fc-4f36-952b-4b9d72992204}
Contained 1 shadow copies at creation time: 11/28/2020 12:03:09 AM
Shadow Copy ID: {5e94520f-cfc0-4ff2-bdc3-50cb02f03f72}
Original Volume: **(G:)**\\?\Volume{dbd87d1a-29ab-4645-b77d-8742584e1bda}\
Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy19
Originating Machine: PCRsComputer
Service Machine: PCRsComputer
Provider: 'Microsoft Software Shadow Copy provider 1.0'
Type: DataVolumeRollback
Attributes: Persistent, No auto release, No writers, Differential
Contents of shadow copy set ID: {61b03cae-ea2a-43c7-b153-3e79730a28a0}
Contained 1 shadow copies at creation time: 3/6/2021 10:11:55 PM
Shadow Copy ID: {48efffa9-ab12-4186-9628-a0ec87b76c9f}
Original Volume: **(G:)**\\?\Volume{dbd87d1a-29ab-4645-b77d-8742584e1bda}\
Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy20
Originating Machine: PCRsComputer
Service Machine: PCRsComputer
Provider: 'Microsoft Software Shadow Copy provider 1.0'
Type: DataVolumeRollback
Attributes: Persistent, No auto release, No writers, Differential