Mac Internal, External, Removable Disk Icon (PNG)

• Create Internal Disk Icon:

sips -s format png /System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/Internal.icns --out $HOME/Desktop/DiskInternal.png

• Create External Disk Icon:

sips -s format png /System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/External.icns --out $HOME/Desktop/DiskExternal.png

• Create Removable Disk Icon:

sips -s format png /System/Library/Extensions/IOStorageFamily.kext/Contents/Resources/Removable.icns --out $HOME/Desktop/DiskRemovable.png

• It will create on Desktop --> the image in 1024px You can convert the image on any image format.