From bandwidths, in samba shares, if you’re getting > 12.5MB/s wired than you’re beyond fast Ethernet 100Mbps
Usually with the v4 firmware, you should be getting average 60MB/s both ups and downs. Best downs are 90-108MB/s and best ups are 60-80MB/s.
For further TCP/UDP test, you could use Netcat aka nc which is available on MyCloud.
For the Win version, http://joncraton.org/blog/46/netcat-for-windows/
If you need Dataset Definition aka dd, http://www.chrysocome.net/dd
Some test e.g. on MyCloud:
nc -vlp1234>/dev/null
On Windows:
dd if=/dev/zero bs=1024K count=100|nc 192.168.1.3 1234
Or switch them around, on Windows:
nc -l 1234>nul
On MyCloud:
dd if=/dev/zero bs=1024K count=100|nc 192.168.1.3 1234
192.168.1.3 is your MyCloud IP or Windows IP depends which you’re connecting to. 1234 is port. Add -u switch on both sides to netcat to switch to UDP. You may increase the dd count for longer test. Remember 1024K x 100.
Edited:Ok found the iperf I build long time ago, pm me if you still need.