What software can I use to sync two folders that can't be seen at the same time, by transferring just the changes on a portable disk?
The scenario: I have a collection of music at home that I occasionally add to, and a collection at work that I occasionally add to. The two machines are never in direct communication, but I can carry a removable disk between the two, so the changes made on either could in theory be propagated.
An ideal solution would be one where I could do things like choose a subset to keep at work.
Clarification: The entire collection is too large to fit on the portable disk