Prior to buying the corder version above, I borrowed this from a family member: LiBa Cordless Massager: https://amzlink.to/az0qyD1foK3Qd (Amazon affiliate)
* Please verify that you have chosen the WD40EFRX (CMR) model when ordering. Also check that you got the correct drives when your order arrives. Avoid the WD40EFAX SMR models!
Note on SMB setup: In the Synology’s File Services settings for SMB, when you click on “Advanced Settings”, I have Maximum SMB Protocol set to SMB3 and Minimum set to SMB1. I also have these four settings with check marks in them, “Enable Opportunistic Locking”, “Enable SMB2 lease”, “Enable Local Master Browser” and “Enable SMB durable handles…”