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.
60GB Steam folder – 29,521 files.
50GB File folder – 28,523 files.
12GB Movie folder – 24 files (mix of Blu-ray and 4K files).
10GB Photo folder – 621 files (mix of .png, raw and .jpeg images).
10GB Audio folder – 1,483 files (mix of mp3 and .flac files).
The real life folder transfer tests saw some alarming dips in write performance, so much so that we watched the tests very closely to see what was happening.
The 60GB Steam Folder file transfer for example, started at a very reasonable 325MB/s but almost immediately the performance started to decay so by the time 35GB had been written, the MB/s rate had fallen to 86MB/s.
On the other hand, the read performance remained strong across the tests.