Tengo un problema con un 850 Evo de 1TB, que sirve como disco externo en una caja SATA. Realmente me gustaría recuperar los datos que tengo en él por lo que cualquier ayuda sería muy apreciada. El disco ha estado funcionando bien como APFS durante mucho tiempo. De repente se volvió ilegible, posiblemente después de usarlo en una caja USB diferente. Al conectarlo, el disco no se monta. He probado los siguientes arreglos/análisis después de navegar por este foro. ¿Hay algo más que pueda hacer para analizar y/o intentar una reparación?
Lectura de GPT y Diskutil: 
Last login: Wed Aug 14 18:10:42 on ttys000
Framelands-MacBook-Pro:~ frameland$ sudo gdisk /dev/disk4
Password:
GPT fdisk (gdisk) version 1.0.4
Partition table scan:
MBR: not present
BSD: not present
APM: not present
GPT: not present
Creating new GPT entries in memory.
Command (? for help): x
Expert command (? for help): p
Disk /dev/disk4: 244139185 sectors, 931.3 GiB
Sector size (logical): 4096 bytes
Disk identifier (GUID): 59E13892-D1CC-4871-AE60-652455350D51
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 5
First usable sector is 6, last usable sector is 244139179
Partitions will be aligned on 256-sector boundaries
Total free space is 244139174 sectors (931.3 GiB)
Number Start (sector) End (sector) Size Code Name
Expert command (? for help): o
Disk size is 244139185 sectors (931.3 GiB)
MBR disk identifier: 0x00000000
MBR partitions:
Number Boot Start Sector End Sector Status Code
1 1 244139184 primary 0xEE
Expert command (? for help): q
Framelands-MacBook-Pro:~ frameland$ sudo gdisk /dev/disk3
GPT fdisk (gdisk) version 1.0.4
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): x
Expert command (? for help): p
Disk /dev/disk3: 1953525168 sectors, 931.5 GiB
Sector size (logical): 512 bytes
Disk identifier (GUID): 2BA6A682-802B-40E9-8DCB-D924582CFC8C
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 8-sector boundaries
Total free space is 2021 sectors (1010.5 KiB)
Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI System Partition
2 411648 1953525127 931.3 GiB AF0A
Expert command (? for help): o
Disk size is 1953525168 sectors (931.5 GiB)
MBR disk identifier: 0x00000000
MBR partitions:
Number Boot Start Sector End Sector Status Code
1 1 1953525167 primary 0xEE
Expert command (? for help): q
Framelands-MacBook-Pro:~ frameland$
Framelands-MacBook-Pro:~ frameland$ diskutil apfs list
APFS Containers (2 found)
|
+-- Container disk1 6801A9B4-1736-46EE-BABA-0DEB9ED0D53C
| ====================================================
| APFS Container Reference: disk1
| Size (Capacity Ceiling): 499963170816 B (500.0 GB)
| Capacity In Use By Volumes: 460495699968 B (460.5 GB) (92.1% used)
| Capacity Not Allocated: 39467470848 B (39.5 GB) (7.9% free)
| |
| +-< Physical Store disk0s2 3689942A-E50C-4A74-A827-B763D501115A
| | -----------------------------------------------------------
| | APFS Physical Store Disk: disk0s2
| | Size: 499963170816 B (500.0 GB)
| |
| +-> Volume disk1s1 6EEB904E-B771-3E0B-8048-C3E4BB58F07A
| | ---------------------------------------------------
| | APFS Volume Disk (Role): disk1s1 (No specific role)
| | Name: Macintosh HD (Case-insensitive)
| | Mount Point: /
| | Capacity Consumed: 450106273792 B (450.1 GB)
| | FileVault: No
| |
| +-> Volume disk1s2 B8CA2171-4A7A-41DB-9E34-F6AEC2EDFC9D
| | ---------------------------------------------------
| | APFS Volume Disk (Role): disk1s2 (Preboot)
| | Name: Preboot (Case-insensitive)
| | Mount Point: Not Mounted
| | Capacity Consumed: 46379008 B (46.4 MB)
| | FileVault: No
| |
| +-> Volume disk1s3 2B5101E3-2892-466D-ADEA-8DB3D4B91B7B
| | ---------------------------------------------------
| | APFS Volume Disk (Role): disk1s3 (Recovery)
| | Name: Recovery (Case-insensitive)
| | Mount Point: Not Mounted
| | Capacity Consumed: 510283776 B (510.3 MB)
| | FileVault: No
| |
| +-> Volume disk1s4 0776BB08-4E72-478C-AD79-8B905F797AD8
| ---------------------------------------------------
| APFS Volume Disk (Role): disk1s4 (VM)
| Name: VM (Case-insensitive)
| Mount Point: /private/var/vm
| Capacity Consumed: 9671274496 B (9.7 GB)
| FileVault: No
|
+-- Container ERROR -69808
======================
APFS Container Reference: disk3
Size (Capacity Ceiling): ERROR -69620
Capacity In Use By Volumes: ERROR -69620
Capacity Not Allocated: ERROR -69620
|
+-< Physical Store disk2s2 CE445FE6-2BFE-416E-AF22-007E56AC0D3D
| -----------------------------------------------------------
| APFS Physical Store Disk: disk2s2
| Size: 999994101760 B (1000.0 GB)
|
+-> No Volumes
