The PS4 that I bought was second hand. It had a custom 2TB Hard Drive. Recently I tried to download update files for Uncharted 4 and BO3. After almost half the file has downloaded it gave an error, i dont have the error code. This error wont go away even if I restarted A GAZILLION TIMES!!!.... The solutions I found on the internet were mainly concerned with IP addresses and DNS and obviously none of them worked. 
On the Sony support site I read that the last solution was changing to the default PS4 Hard Drive.
Where I live it costs a lot and Im basically dying because its been a very long time since ive played online because of the update file... Have played Uncharted 4 THRICE!!!
Should I replace it? I have also tried to Initialize the Ps4 and by the way the hard drive also gives me a really low exchange rate... Its probably crap... ANY HELP WOULD BE GREATLY APPRECIATED!... Thanks for reading through it all ...