I am trying to use SyncToy 2.1 but am seeing a several problems. Here is what I did:
1) I copied the data from my desktop to my external drive via eSATA. I then ran SyncToy to double-check the copy and it said it was all sync'd (as it should).
2) Then I connected the external drive to my notebook via USB and copied the files there (and checked with SyncToy -- all good again).
3) Then I plugged the external drive into the router (making it a NAS) and syncing from either the desktop or the notebook see LOADS of files as changed that did not change.
I also tried syncing directly from my notebook's drive to my desktop, and again SyncToy saw a lot of phantom changes (albeit less than above). I confirmed all the files that it thinks changed have the same date & time code on both drives. I
also disconnected the external drive from the router and connected via USB to the desktop, and SyncToy saw no changes (as it should). The folder I am attempting to sync is the My Pictures folder.
I selected a folder within My Pictures (that was only ~100MB) and tried to do syncs with it, and it still showed phantom file changes. I ended up doing the sync on this small folder anyway, but until I created folder combos (one D:-to-N: and the other
N:-to-D:) and ran them both SyncToy wouldn't properly sync the folders. And then after it finally did, if I disconnected the NAS external drive (N:) form the router and connected it to the PC via USB the ran SyncToy -- then it again found phantom changes.
From my experience, SyncToy 2.1 does NOT work well -- at all -- across a Network!