Wow! Thank you, Tom: that all makes a lot of sense, but it gives me quite a problem I think. I had intended to use Dropbox to allow me to continuously work with the same database whichever location I am in. This is what I have been used to in FTM, and I suppose that FTM embeds the images in the database with the person, so they all move together. I find this way very disconcerting, but I'll have to work out how to set up a workflow. If anyone has hints, I'll be grateful to read them!