macbook-pro-de-matthieu:~ Matthieu$ diskutil rename disk2s2 Save_Macintosh_HD
Volume on disk2s2 renamed to Save_Macintosh_HD
macbook-pro-de-matthieu:~ Matthieu$ diskutil resizevolume disk2s2 30% jhfs+ Clone 30% jhfs+ Divers 0b
Resizing to 600109576550 bytes and adding 2 partitions
Started partitioning on disk2s2 Save_Macintosh_HD
Verifying the disk
Verifying file system
Volume was successfully unmounted
Performing fsck_hfs -fn -x /dev/rdisk2s2
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Checking volume bitmap
Checking volume information
The volume Save_Macintosh_HD appears to be OK
File system check exit code is 0
Restoring the original state found as mounted
Resizing
Shrinking file system
Modifying partition map
Initialized /dev/rdisk2s3 as a 559 GB case-insensitive HFS Plus volume with a 49152k journal
Mounting disk
Initialized /dev/rdisk2s4 as a 745 GB case-insensitive HFS Plus volume with a 65536k journal
Mounting disk
Finished partitioning on disk2s2 Save_Macintosh_HD
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Save_Macintosh_HD       600.1 GB   disk2s2
   3:                  Apple_HFS Clone                   600.0 GB   disk2s3
   4:                  Apple_HFS Divers                  799.7 GB   disk2s4
macbook-pro-de-matthieu:~ Matthieu$
macbook-pro-de-matthieu:~ Matthieu$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         430.1 GB   disk0s2
   3:       Microsoft Basic Data BOOTCAMP                70.0 GB    disk0s3
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +430.1 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            366.2 GB   disk1s1
   2:                APFS Volume Preboot                 20.5 MB    disk1s2
   3:                APFS Volume Recovery                520.8 MB   disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Save_Macintosh_HD       600.1 GB   disk2s2
   3:                  Apple_HFS Clone                   600.0 GB   disk2s3
   4:                  Apple_HFS Divers                  799.7 GB   disk2s4
macbook-pro-de-matthieu:~ Matthieu$