Why not 10 GB? Why not 100 GB?
These files are usually filled with one of two things: 50 gb test file
If you do not want to create your own file, several "looking glass" sites and speed test providers host 50 GB dummy files for public download. These are excellent for testing ISP peering or the download speed of a new server. Why not 10 GB
Simply to another location on the same drive (or different drive). In Windows, open Task Manager > Performance > Disk and watch the "Write" graph. Divide 50 GB (in MB) by the time in seconds. open Task Manager >
Transfer the 50 GB file from a PC to a NAS or between two PCs via SMB / AFP / NFS. Monitor using: