et voilaVa à la barre de menus du Finder > Finder > Préférences > Général => coche les cases d'affichage de : "Disques durs" & "Disques externes". Va chercher le Terminal dans ton volume Macintosh HD 750 Go.
- passe la commande :Bloc de code:diskutil list
- et poste le tableau des disques => que je voie la situation.
		Bloc de code:
	
	/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk3         1000.0 GB  disk0s2
/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:                 Apple_APFS Container disk2         694.8 GB   disk1s2
   3:       Microsoft Basic Data BOOTCAMP                55.0 GB    disk1s3
/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +694.8 GB   disk2
                                 Physical Store disk1s2
   1:                APFS Volume Macintosh HD 750 Go ... 369.6 GB   disk2s1
   2:                APFS Volume Preboot                 25.6 MB    disk2s2
   3:                APFS Volume Recovery                523.5 MB   disk2s3
   4:                APFS Volume Macintosh HD 750 Go     11.0 GB    disk2s4
   5:                APFS Volume VM                      4.3 GB     disk2s5
/dev/disk3 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +1000.0 GB  disk3
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD 1 To       960.1 GB   disk3s1
   2:                APFS Volume Preboot                 24.1 MB    disk3s2
   3:                APFS Volume Recovery                507.3 MB   disk3s3
   4:                APFS Volume VM                      5.4 GB     disk3s4
/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *4.0 TB     disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:          Apple_CoreStorage DeeMaxtor               1.5 TB     disk4s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk4s3
   4:                 Apple_APFS Container disk6         1.0 TB     disk4s4
   5:                  Apple_HFS DeeMax2                 750.0 GB   disk4s5
   6:                 Apple_APFS Container disk5         250.0 GB   disk4s6
   7:                 Apple_APFS Container disk7         497.6 GB   disk4s7
/dev/disk5 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +250.0 GB   disk5
                                 Physical Store disk4s6
   1:                APFS Volume Clone 750 Go            177.6 GB   disk5s1
   2:                APFS Volume Preboot                 22.0 MB    disk5s2
   3:                APFS Volume Recovery                514.5 MB   disk5s3
/dev/disk6 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +1.0 TB     disk6
                                 Physical Store disk4s4
   1:                APFS Volume Clone 1 To              940.5 GB   disk6s1
   2:                APFS Volume Preboot                 22.0 MB    disk6s2
   3:                APFS Volume Recovery                514.5 MB   disk6s3
/dev/disk7 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +497.6 GB   disk7
                                 Physical Store disk4s7
   1:                APFS Volume Clone MH750 Données     353.2 GB   disk7s1
/dev/disk8 (external, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS DeeMaxtor              +1.5 TB     disk8
                                 Logical Volume on disk4s2
                                 A33476A1-5538-4F98-A9D8-8A25E0C30FC1
                                 Unlocked Encrypted 
	 
	 
 
		 
 
		 
 
		