Properties of plasma turbulence in the boundary region of magnetically confined plasmas are investigated in three-dimensional full torus numerical simulations of TCV experiments with a lower single null divertor configuration. Simulations are performed using the full-F, isothermal, electromagnetic, gyro-fluid model FELTOR and compare favourable and unfavourable magnetic field directions by inverting the total magnetic field. An analysis of particle transport and intermittent fluctuations, utilizing synthetic field-aligned probes, shows strong ballooning behaviour in cross-field transport. The transport maximum is situated above or below the outboard mid-plane depending on the magnetic field direction, with increased fluctuation level and intermittency near these regions. The three-dimensional simulations further allow us to examine the structure of individual filaments along magnetic field lines and provide a physical interpretation of their parallel dynamics. Examining the fluctuation structures reveals coherent plasma filaments with a poloidal scale length of in the scrape-off layer (SOL) that are not strictly field-aligned. As filaments cross the separatrix, the scale length halves and a time delay is observed along the magnetic field lines. The simulations replicate universal statistical properties of SOL fluctuations observed in experiments, validating the model’s ability to describe turbulence dynamics. These findings provide insights into filament dynamics and their role in cross-field transport, offering a foundation for further validation and extension of gyro-fluid models to include temperature dynamics and plasma–neutral interactions for a more comprehensive description of edge turbulence.