MediaBay sync between main drive and external drive


I’m having some problems syncing mediafiles between my main drive and my external hard drive.

My library is only composed by broadcast .wav files (24 bits @ 48 khz). I know that the metadata is written into the files, but when I sync the drives (using SyncToy) when I open Nuendo’s MediaBay in my mobile computer, reading from the synced external drive, some of the changed metadata is not there (ratings, key and special attributes), even when I rescan the files and/or the drive completely.

Is there a way to safetly sync drives without losing any information?

Thanks in advance!