Yesterday I bought a 4tb red from amazon , everything was when at the start , I plugged the HDD , went to the desktop and did a quick format. then I started transfering some files from my old WD2002FAEX 2tb black, the speed was around 110mb/s but at some point it drops to 700kb/s then stopped completely and I had to close the process.
I though there were some problems with my 2Tb black and did a chkdsk /f /r but no errors were found and it passed both the SMART and Lifeguard diagnostic’s quick test.
then I came up with the idea of doing a fulll fomart on the 4tb red , but it took so long(3hours 5%) and I stopped it ,after I reboot my computer the 4tb red cannot be decteted by the Bios anymore(sometimes it says the hdd failed the SMART test and can be seen in the bios but not in windows) I changed the sata cable and another sata port and tried it on another computer but still no success.
…So what should I do now ? Thanks in advance