Thanks everyone for the reply. I have overcome the problem. Sharing it for the benefit of others. I called the WD customer care and they advised me the following: 1) initialize the disk by going to disk management you do this by pressing (win+x), pop up appears and click on OK. 2) then right click on the unallocated volume from the new drive and create a new volume. This will basically format the disk once. 3) finally, now when I tried to clone the disk, it allowed me to....
[IMAGE][IMAGE][IMAGE]2016 Alienware 17R3  current: Hitachi 1TB HDD replacement: Western Digital 2TB SN550  SSD My plan is to clone this HDD to SSD, then remove the HDD, and use it as a backup in a external HDD enclosure   I have downloaded the Acronis True Image 2021 software from the western Digital Site.  I have installed the SSD in the SSD slot within the laptop and tried to clone HDD to SSD using the software. however, I am not able to click or press on the Clone button . It says " western digitial drive required"    Does it mean that the software only works for western digital HDD ?  When i try to open disk management, it is showing a pop up window to click ok. . Is it due to this reason ? Attached images for your reference  
17 R3, unable to clone using AcronisTrueImage 2021