I'm looking for a program (hopefully free) that essentially syncs an external hard drive with files on the computer's hard drive, and updates them both with the newer files. Pretty much how syncing works with an iPod - though without the nasty habit of deleting something from both locations if you deleted it from one.
My situation: I work on a Mac in the office (and sometimes PC, but for my case, this thread is very much focused on the mac), and I have all my files on an external hard drive. A lot of large, graphic design type files. I often work from home as well, so everything is on this external hard drive. Not very good if it fails, though I do semi-regular backups onto our servers at work, it takes a long time and the most current files are always with me locally. What I want is to have a folder on my work mac, and a folder on my external drive, that are identical in structure and files. Essentially a copy. But if I make a change, or work on and update a file in any one of them, when I plug in the drive, and run a program, I want to sync those changes.
I'm also pushing to get a time capsule here at work for Time Machine, just to make extra sure we have backups. There are a couple of people in the office interested in all this as well, though I'm the most technically proficient of them and so it's my task to find a good solution. I've looked online, and mostly found web solutions to sync files. This will not work. I need a local solution that does not require a network connection - that would be far too slow with the files I'm working on.
Anybody have anything? As I said, free is good, but we'll pay for quality software if that's the best choice. While I need software for the mac, I also have a work PC running XP, and a computer at home with Windows 7, so I'd like to hear about Windows programs as well. That's optional though, as the mac program is a necessity.
Wii U: DHS-Odium // Live: DHS Odium // PSN: DHSOdium // Steam: dhsykes // 3DS: 0318-6615-5294