Apparently I was one of like 11 people who was using Windows Live Mesh for its ability to passively sync arbitrary folders between PCs. Since I have multiple machines that have lots of data between them, it's a nice way to have redundancy without manually syncing drives all the time. Unfortunately WLM is being end-of-lifed, and its replacement, SkyDrive, is omitting this feature. In the past I've used other software that tried to do this, but it was often cumbersome and slow and would require a direct connection between the two PCs. Anyone have any recommendations? DropBox, SkyDrive cloud storage, etc. aren't sufficient because I'm hundreds of GBs of data.