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Resetting SyncServices

Complete folders are disappearing from my HD since it has been replaced. Searched for them with no success. iSight camera and FireWire port does not recognize external camera. Thoughts?????

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I strongly doubt the new drive would be the cause of the folders disappearing.  Usually this is the case of either human error or damage to the main directory.  Can you recover them from backup (time machine)?  The FW and isight camera issues should also be unrelated to the hard drive as well.  Can you mount a FW drive?  
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