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.
10GB Photo folder – (304 files – 171 @ .RAW, 105 @ JPG, 21 @ .CR2, 5 @ .DNG).
5GB (1.5bn pixel) photo.
21GB 8K Movie demos – (11 demos)
16GB 4K Raw Movie Clips – (9 MP4V files).
The Lexar CFexpress Type B dealt with our real-life file transfers without any problems. The card show consistent performance for both read and write transfers, averaging 520MB/s for reads and 459.8MB/s for writes.