Slow data transfer speeds on a synology NAS

Transferring files to and from my synology NAS over SMB protocol seemed very slow to me on the shares I have.

After a little bit of investigation I found that the SMB settings by default are only using SMB2 and not SMB3!!!!

Boom, now transfer speeds are super fast between PC and Synology NAS, yay!!

SMB3 Tranfer Speed - Slow data transfer speeds on a synology NAS

Instructions to change the advanced settings here =

Login to the Synology NAS and click on Control Panel:

nas control panel - Slow data transfer speeds on a synology NAS

Click the enable SMB service checkbox then head into advanced settings –

nas smb1 800x312 - Slow data transfer speeds on a synology NAS

In advanced settings, set the maximum SMB protocol to SMB3, the minimum to SMB 2, and I disabled transport encryption mode as I am running in my home network only for SMB (you can set this to either dependant on your situation). I also enabled opportunistic locking.

nas smb2 - Slow data transfer speeds on a synology NAS

After using these settings it took my file transfres from around 7 MB/s to around 100 MB/s – nice…. :O)