SD card and file handling

I have just installed a Sentry 2 camera; amazing value, think I might get another!

  1. Does anyone know how to download videos from it?
  2. How do I manually delete videos from it?
  3. How long does it take to fill up the 128Gb SD card?
  4. What format are the video files?
    Is there a detailed manual available?
    That’s all for now!!