This contains the original simulation data used by the paper 'Generation of field-aligned currents during substorm expansion: Updated' published in Journal of Geophysical Research - Space Physics (https://doi.org/10.1029/2022JA031011). The data were obtained by the global MHD simulation (REPPU) with Level 6. The VTK file (Visualization Tookkit format) contains the physical variables in the magnetosphere at t = 177.79 min as Plasma pressure (P in nPa) Velocity vector (V in km/s) Current density vector (J in nA/m2) Magnetic field vector (B in nT) V.Ft (where V is velocity and Ft is the magnetic tension force) (in 10^(-12) W/m3) The VTK file can be opened by Visualization Toolkit, and 3-D visualization software packages "VisIT", and "ParaView". The ASCII files named packet-position.txt includes a list of the position of the packet traced backward in time from the position P (66.6 MLAT and 23.4 MLT). This file was used to make Figure 4. From the left column, time in minutes, -x, -y, and z in Re are provided. (The origin of the coordinate is located at the center of the Earth. x and y point toward the Sun and dusk, respectively. z is antiparallel to the Earth's dipole moment.)