I have an Asus g752VY and when i start my laptop there is this message and I assume I have to replace my hard drive but I don't know why this happen suddenly because it works yesterday without the error.
That is the thing about SMART errors, they do tend to come out of nowhere in a "fine one day and not the next" fashion as the drive reaches the threshold for a problem. You might seen some slowing down of a drive beforehand, but that isn't always the case. If you want to know more about what is going wrong with the drive you can sift through the SMART data with something like CrystalDiskInfo
Its tell you, that your need to immediately create a full drive image of your hard drive if you still can. Buy an new hard drive or even better get yourself a M.2 NVMe SSD and restore that image you made to that hard drive/SSD. Failure is going to happen sooner than later.
G752VY-DH72 Win 10 Pro 512 GB M.2 Samsung 960 Pro 1 TB Samsung 850 pro 2.5 format 980m GTX 4 GB 32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K Windows 10 Pro Z97 -A Windows 10 Pro