Why does my external Time Machine backup drive become inefficient after each Time Machine backup?
I check the my high quality external spinning backup drive before each Time Machine backup via Firewire, with DiskWarrior: Very efficient!
After each Time Machine backup DiskWarrior says: Drive is inefficient!
Any explanation and help to fix this will save having to fix Directory Optimization after each Time Machine backup!
Mac Pro, OS X 10.11