It's also more tolerant to interrupts when copying files over a network connection, supports 'advanced' NTFS features, can preserve timestamps (copying a file won't change 'last edit'), is able to auto-skip files with identical size and timestamp, and it has a 'backup mode' which allows an admin to copy directories containing files they normally are denied readability for, making it a good choice if you just want to regularly backup some files to a network share without using a third party tool.

The Package Center offers GoodSync and Resilio Sync. However, they don't provide file sync software. Scheduled backups are working great with the Synology 'Active Backup' software. Third party copy tools like TerraCopy or FastCopy instead use windows built in robocopy function which (among other things) supports multithreading which makes it able to copy multiple files simultaneously. I have a new Synology DS720+ that I want to use for both system image backups and two-way file sync.

The default copy function of windows is limited to one thread and thus can't copy multiple files simultaneously because that's how copy on windows always worked and MS don't want to risk to break something that requires this. IIRC the reason (as for many things which suck with core Windows) is backwards compatibility.

Freefilesync synology nas