I would like to ask for help with following issue. While I am recording with my FORMULER S4 Turbo (bought last year, the newest firmware and software installed) on USB disk or Micro SD card the recording if larger than 4 gb is divided into separate files with size of each limited to 4 GB. I tried to combine these recordings to get for example a film to 1 file but there is some problem and the disruption when the recording stoppped in first file after reaching the limit of 4 GB and continuing in the following one is visible. USB and micro SD card are formatted with NTFS file system, I tried to format them through PC, Rufus and also FORMULER S4 internal format function. The problem still persists. Any hint or idea how to solve this issue are welcome, thank to everybody.