To test real-life performance of a drive we use a mix of folder/file types and by using the FastCopy utility (which gives a time as well as MB/s result) we record the performance of drive reading from & writing to a 256GB Samsung SSD850 PRO.
100GB data file.
60GB iso image.
50GB File folder – 28,523 files.
21GB 8K Movie demos.
11GB 4K Raw Movie Clips (8 MP4V files).
4.25GB 3D Printer File Folder (mostly .STL).
1GB AutoCAD File Folder (.dwg and .dxf).