If you’re using an SSD, there are a few things you can do to extend its life. One of the things you can do is move the search index cache.
The Search Index I/O activity can take a considerable toll on your system drive by keeping it busy. If you have an SSD, this may reduce its life. By moving the index to a separate drive, you can increase overall performance of your PC (more noticeable under load) and preserve the life of your SSD.