I will hack my WDMBWE with your OS.
before, I want to know if the disk will be cleaned or if can I migrate without lost of data ?
Thanks for your help
If you mean change the firmware and run hacks then no. You won't lose any data unless you do something daft. If you don't possess Linux skills the chances of bricking your device increase dramatically. Trying to get device up and running after bricking is not easy especially if you have the 1TB (500GB x 2) edition. If you decide to proceed I would recommend that you back up anyway.