Are favorites saved on the hardrive-

Hi ,
All PCs/servers must be backed up.
Without a backup , you must always start from scratch to re-install everything.
If you cannot afford backup , hard disk recovery charges are even higher (more expensive).
It is still cheaper to backup and be ready for emergencies.
If you do not backup regularly , you run this risk.
Even then , you must also regularly test recovery to ensure backup is sound.
Good luck,
David