pnesalop Do I need to enable or ignore the message DOSSIER file found in 1 PHOTOS MASTER?
Yes, you need, it contains data about people (family ties. However, if your did not you still can enable it later in Library locations.
pnesalop Can I shutdown PC mid-synchronisation or do I need to leave it for 2 days like last time?
Sure, you can. It will continue once you will turn it back on. The only disadantage, remaining time prediction might become inaccurate after that. But it does not affect how much time actually will be spent.
