Reasons star ratings can be lost with file movement
A client gave me 500+ RAW files on a thumb drive, instructing he'd "flagged" (starred) the 60+ files I was to edit in Bridge. I dragged the containing folder to my PC from the thumb drive using Windows Explorer, to two locations for surety, and opened in Bridge. Upon checking, there were no ratings on any file in either folder! I generally uncheck "show hidden files" but I for this issue I checked it and viola no xmp files. I presume he flagged (starred) the choices, and lost the xmps moving the files to the thumb drive. Doing some testing I reasserted that if you simply drag the files outside Bridge, you lose the sidecar xmp files, at least via Windows Explorer. Done inside Bridge, all is well.
I need to reassure my client that I did not screw up these files, without causing any bad relations telling him he really does not know how to use his software. I expect him to report soon, "I just looked at my copies, and yes I flagged those files!" inferring it is my mistake.
So I am here as I'd like to invite any corrections of my opinion that; while he most likely did star the files, he lost the ratings by dragging the files to the thumb drive via the Mac finder, or otherwise outside Bridge (he probably flagged file in a folder on his desktop, then drag copied that folder to a thumb drive icon on the desktop). That is, do I have this sussed out correctly, anything I am missing some other explanation, any other ideas?
