Syncing files from one computer to another used to be a constant task in my work flow. Sometimes it created annoying workflow bottlenecks.
If you need to have copies of the same files on different computers,you simply have to try out DropBox.com. This amazing free service lets you keep multiple computers in sync so seamlessly that you will forget about it.
I used to move files back and forth with USB drives. I have a drawerful of USB drives and a couple of portable hard drives that are obsolete. Instead, Dropbox creates a special folder called "Dropbox." Anything put in that folder gets magically synchronized to Dropbox's servers, and then downloaded to the other selected machines automatically. It is not intended as a backup service, but the files are stored on the Dropbox server and the multiple machines. Even better, it is cross-platform and works on PCs, Macs, iPads, and even smartphones.
Dropbox totally changed my workflow for the better. Try it out. If you use my affiliate code by using this link, you'll get an extra 250Mb of DropBox storage for free: nealfortin_dropbox_link. The 2GB account is free. Give it a shot. It is awesome!