New WD30EFRX for old NAS

Our NAS has 3 WD Red WD30EFRX disks, classified as NASware and rated as of August 2013.
They have a red label placed in the center of the disc.
We need to add a fourth HDD, but all WD30EFXR HDDs on the market are either NASware 3.0 branded or have a red label that covers the entire drive.
I would like to know if they have the same geometry and if they are suitable for our NAS.

Hi,

You may refer to the following link to check WD Red Drive Specifications:

Given the 2013 vintage of the disks, it may be prudent to replace all of the disks. Disks do not last forever