Hi All, I have just used grsync to ensure that my RAW datafiles on my RAID 1 drive and a copy of the RAW datafiles on my External hard drive are consistent by effecting necessary changes on the external drive as necessary. But what I now have (5 hours later) is a whole new copy of the RAW datafiles inside the existing directory on the drive, this has doubled my storage (200Gb to now 400GB), I plan to delete the parent folder on the drive and retain the new folder. But what is going to happen when I want to update with more RAW files? There is a check box "ignore existing" but how far does that go? If I make changes to the contents of an "existing folder" on my RAID 1 drive will those changes also be applied to the folder in the External drive? For the moment I will rename the NEW folder to RAW2files move it to the top level and then delete RAWfiles. and rename RAW2files to RAWfiles. Many thanks Andrew Greig