Mysql HDD vs SSD

[Niklas]

I tried using a HDD for inserting a good amount of data and then compared to using a SSD / NVMe and the results are great, the ssd/nvme outperforms HDD big time, but is it possible to have a HDD drive and still get the same results, perhaps by using RAM?

I got innodb but from what I understood, RAM mysql performance is only for read / select but not for insertion?