I have two laptops. Laptop B was set up after Laptop A, and files from Laptop A were copied to Laptop B. We decided we wanted these files synced, so I want to try BTSync. What happens when you sync folders with existing copies of data? Laptop A also has had new files added since Laptop B was set up, which haven't been copied. I tried it this morning and it seems like it's trying to copy everything again between both laptops, even though the data exists. It shows time remaining as years (70+GB data).