I currently have 1TB approx. of music into a separate internal HDD. I need those files to be automatically copied into an external HDD and also update the files when i make some changes into the source music folder (internal drive). The files on the external drive must be usable (no .bak files etc), because I occasionally want to detach that drive and take the music with me on vacation or something. Is this possible with a software or something?
I prefer real time updates, but fixed interval updates are also ok for me.
I'm using win7.