Zero risk of breaking the screen; very fast boot times. Cons: Takes up a port; a small box sits on your desk.
If you have a 2012–2019 iMac, you can swap the internal hard drive for a (like the Samsung 870 EVO). Pros: Massive speed boost; feels like a new computer. buy fusion drive for imac
If either the SSD or the HDD fails, you lose all your data. Zero risk of breaking the screen; very fast boot times
Mechanical hard drives are the biggest bottleneck in older Macs. Zero risk of breaking the screen
Pure SSDs have dropped in price so much that hybrids no longer make financial sense.
Requires opening the Mac, which involves cutting adhesive strips and careful handling. 2. External Thunderbolt/USB 3.1 SSD