Is it possible to swap HDD from PS4 to PS4 Slim?
Solution 1:
Unfortunately you are out of luck. The content on the drive is locked to the console it was used on, so moving the drive to a new console means it must be formatted before it can be used. If you put the drive back into the original console then it would continue to work (but I see that you no longer have access to the previous console).
The only option you have is to format the drive on the new console (and lose all the data on the drive as a result). You would then need to download your games again, and your save data (if you have PS+).