The laptop was supplied with a Samsung 256GB disk.
Here are the results with KDiskMark, an open source GUI tool which calls Flexible I/O Tester.

The Intel Wi-Fi 6 AX201 (802.11ax) performance is perfectly respectable. I tested my internet speed over WiFi with the laptop on a different floor to the router. Here are the results.

Better speeds are obtained with the laptop in the same room reaching around 1300 Mbps download speed.
The machine has 1G ethernet so I’m not able to max out my broadband without using a 2.5G USB ethernet adapter.
Complete list of articles in this series:
| HP ProBook 440 G8 Laptop | |
|---|---|
| Introduction | Condition of the refurbished laptop |
| Specifications | Let's interrogate the laptop specifications |