When you restored your hard drive did you have copies of the sync control files to restore as well as the FTM file and it's media folder?
Without those control files you won't be able to sync.
The backup command gives the option of saving the sync control files together with the media folder into an FTMB file.
Without those control files you won't be able to sync.
The backup command gives the option of saving the sync control files together with the media folder into an FTMB file.