What is the reason for the drop in speed?

[ksg]

What is the reason for the drop in speed?
Picture

[xCSxXenon]

Write cache fills up
Switching from large files to small files
Antivirus
3rd party access of the location(s)
Unstable connection
Failing storage device(s)
Magic

[ksg]

"Switching from large files to small files"
Does the program check small files first?
Why does the slowdown always happen exactly at 10 seconds?
Is this not related to the free version?

[xCSxXenon]

"Switching from large files to small files"
Does the program check small files first?
Why does the slowdown always happen exactly at 10 seconds?
Is this not related to the free version?

The program doesn't necessarily do small files first
Sounds like your write cache fills up in 10 seconds
Free version has not speed limitations

[ksg]

"Free version has not speed limitations"
There is a limit on the number of threads.

[xCSxXenon]

"Free version has not speed limitations"
There is a limit on the number of threads.

Correct, but threads are very rarely going to result in a speed improvement. They only help artificially throttled transfers