I’m sure you’ve encountered a point when moving files to a solid-state drive (SSD) suddenly grinds to an unexpected halt, and wondered what was causing this to take place. After all, the manufacturer likely promised considerably higher speeds for the SSD, which lured you into a false sense of hope with drive performance. The reasons for these slowdowns can vary depending on the SSD and wider system it’s connected to, but for cheaper flash storage, it can be caused by the SLC cache. This can cause transfer speeds grind to a crawl, sometimes reaching figures you’d typically see with hard drives.