Sudden Slow Down Transferring Between Devices

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX2
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I have the MyCloudEX2Ultra, and have been using it probably 5+yrs now.

Typically, transferring from PC to NAS, I’d be up around 60-80MBps.

I recently upgraded my PC, which now has a 2.5GBps ethernet port, and a new router (TPLink AX3000) setup as an Access Point. I have Cat6 ethernet cables between the PC and NAS and both attached to the same router. Internet speeds are the same as before hitting a max of about 2ms ping and 105mbps down/up speed.

For some reason, however, i’m maxing out at about 24Mbps transferring from PC to NAS.

Any MyCloud settings I should be checking?

Network speed seems totally fine for everything, except the NAS.

1 Like
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Solved: Windows 11 24H2 is to blame. issue with SMB - found this and it works!!!

A solution to fix the slow data transfer rate. It can probably fixed with a 32-Bit-DWORD entry RequireSecuritySignature = 0x0 in the following key:

HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\

Also add this value not only in the LanmanWorkstation key, but also into the LanmanServer key.

My transfers from PC to WD MYCloudEx2Ultra returned to normal, 110+ MBs from the crappy 24 MBs after the 24H2 update. Thanks Microsoft!

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It’s very annoying… definitely has to be a setting somewhere.

I’ve (since posting) tried a few things,

  • New ethernet cable
  • Switching ports on the router
  • Jumbo Frames is disabled
  • Checked my Speed/Duplex and tried changing from Auto to 2.5GB full duplex, and 1GB full duplex and no changes
  • Disabled IPv6
  • Blew away my network card, rebooted and installed drivers directly from the manufacturer site

My MyCloud EX2 settings have not changed in about 5yrs. The router has GB ethernet ports and is set to Access Point mode so should just push stuff through. Almost curious enough to format the C:\ and install Win10 again and see if that works. Doesn’t tell me ‘what’ is the issue but narrows it down.

Just built the PC and already reinstalled Win11 twice so, not eager to do it a 3rd this this week.

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Someone in another thread linked to this

I ran the two regedit commands and rebooted, and now went from 24MB/s, up to 105MB/s!

command window as Admin

reg add “HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters” /v RequireSecuritySignature /t REG_DWORD /d 0 /f

reg add “HKLM\SYSTEM\CurrentControlSet\Services\LanManServer\Parameters” /v RequireSecuritySignature /t REG_DWORD /d 0 /f