This isn't just an XP issue, as I'm on Windows 7 and Windows Live Sync is going away for everyone. It says this on their site:
Windows Live Mesh 2011 is replacing Windows Live Sync, and new users can’t download Sync anymore. In early 2011, this website will be shut down and your files will stop syncing.
I have four machines that I sync up using Windows Live Sync, with 20 different synchronized folders and well over 100 GB of data. I've been raking the net lately for alternatives and can't find any luck. Most will sync folders on a single machine and the only ones I've found that will sync between computers will only do it through Windows Shares or FTP or WebDAV.
I'm looking for a direct alternative to Windows Live Sync, which, for those who aren't familiar, installs on each of your computers that you're syncing and has a website where you sign in using your hotmail or live account and manage your machines. You can easily designate which folders you want to share on which machines, the type of sync you want, as in mirrored or just update one side, and then you're done. The Windows Live Sync program runs in the background on each machine, and as soon as I make a change on one machine, it starts to send it over to another.
Whenever I would have to format a machine I wouldn't back a single thing up thanks to this. I would simply wipe the machine, then install Windows Live Sync and set the folders back up using the simple interface, and they'd transfer all of the data back over for me.
So that's the gold standard and what I'm looking for. I used it between my home machine, my laptop, and two work machines. No matter where I was in the world with my laptop, my data was redundantly backed up using Windows Live Sync, and I would really hate to lose that at the end of this month. Help please!