This is a procesure for tranfering files from PC to N810.

  1. On N810 enable Bluetooth (set to visible)
  2. On PC, adding bluetooth devices, search and find N810(passcode is an option.)
  3. On PC, put your file to "Bluetooth 交換フォルダ" in My Documents (In English, I don't know the name of the folder, for example "Bluetooth Exchange Folder.")
  4. On N810 open the file manager and you'll find Bluetooth menu on the left pain.
  5. On PC, permit file transfering with N810.

Good Luck ;-)