RN104 Slow Read Speeds

I'm also having trouble with slow file transfers after upgrading Firmware to OS 6.4.2. Installed are 2x3Tb WD Red - At first i suspected the HDDs to be too slow. After some struggle, resets and reloads of the Firmware, and disabling Snapshots, AFP I might have found a backdoor. I changed the folders location on e.g. my videos:

From 

\\Readynas104\videos

To

\\192.168.1.xxx\videos

It is the same location, but when I did a LAN-test I got forllowing results:

Before:

NAS performance tester 1.7 http://www.808.dk/?nastester
Running warmup...
Running a 400MB file write on S: 5 times...
Iteration 1: 67,21 MB/sec
Iteration 2: 63,83 MB/sec
Iteration 3: 63,52 MB/sec
Iteration 4: 58,67 MB/sec
Iteration 5: 61,28 MB/sec
-----------------------------
Average (W): 62,90 MB/sec
-----------------------------
Running a 400MB file read on S: 5 times...
Iteration 1: 47,71 MB/sec
Iteration 2: 49,25 MB/sec
Iteration 3: 47,44 MB/sec
Iteration 4: 48,71 MB/sec
Iteration 5: 49,04 MB/sec
-----------------------------
Average (R): 48,43 MB/sec
-----------------------------

After:

NAS performance tester 1.7 http://www.808.dk/?nastester
Running warmup...
Running a 400MB file write on Z: 5 times...
Iteration 1: 49,26 MB/sec
Iteration 2: 50,14 MB/sec
Iteration 3: 63,18 MB/sec
Iteration 4: 67,86 MB/sec
Iteration 5: 58,68 MB/sec
-----------------------------
Average (W): 57,82 MB/sec
-----------------------------
Running a 400MB file read on Z: 5 times...
Iteration 1: 77,40 MB/sec
Iteration 2: 71,70 MB/sec
Iteration 3: 77,91 MB/sec
Iteration 4: 74,98 MB/sec
Iteration 5: 78,86 MB/sec
-----------------------------
Average (R): 76,17 MB/sec
-----------------------------

Kindly give a feedback if it works....