For everyday data transfer, the dual-connector PNY Duo Link V3 is tops. For heavy workloads -- it's by far the slowest SSD we ...

The light is still on it (it is a Seagate Free Agent hard drive, probably 10 years old or so), but it no longer makes any noise. Of course, I have all my pictures and financials on there.

Assuming your laptop currently has a standard hard drive, it is almost certainly a 2.5 Inch SATA drive. So, you will be replacing it with an SSD of the same size and interface (internal connections).