"To speed up magnetic hard drive performance , is often used. "

disk caching

Explanation:

Hi,

Magnetic hard drives use disk caching to speed up performance. This method is quite ingenious because what it does is that in a section of memory in your pc, it keeps a copy of information that was previously accessed in the hard disk. So, next time if the same data is requested, the system can refer to cache to get quick access rather than going to the hard disk (which is slower).

explanation:

so if you are under a school block you cant but it may also be do to you having to add it to your chrome book like an app like i did or its the wifi you have blocking it