Should I replace My internal hardisk to a new external one? [closed]

My old internal 1TB HDD becomes so slow suddenly, and I'm afraid that it's about to die, so I will try to copy my data to external HDD.

I have two Questions:

1. What's the best tool to copy all the HDD data to my external HDD?

2. I have two options to replace my internal HDD:

   1-Buy another internal HDD.

   2-Buy external HDD instead But in this case I will use it as internal and I will never unplug it from the usb?(Is this wrong for the external HDD?)

Solution 1:

1. You can copy all your data with the Windows 10 builtin command-line utility robocopy, documentation is here.
2. Do not use an external drive as your main filesystem. These drives are connected to your computer via USB which is slower and less robust than SATA or M.2 used for internal drives.