I must preface this, don't read furthur if your not seriously geek.

https://arstechnica.com/gadgets/2020/02/how-fast-are-your-disks-find-out-the-open-source-way-with-fio/

  download https://bsdio.com/fio/

 

The first 1/3 or so of the artical will explain what is happening with all reads/writes to your media.

Be it a spinner or SSD.

Works on all consumer and enterprise systems storage

 

Even if you are hard core geek, I urge caution upon using this as I don't know if it does destructive writes.

 

 

 

A timely article for those who think it's not worth obtaining a solid state drive unless you have a minimum of a  SATA III interface.