If you're interested in upgrading your external hard drive, you might want to check out this article.
If your current hard drive isn't enough, you can consider using a Seagate hub hard drive and modify the external case by adding a cooling fan.
The case can be fixed internally with a metal plate.
As for the conversion chip, this hard drive case features two USB 3.0 ports, which is why this chip appears on the board.
SATA conversion chip.
The PCB board is well-made, especially considering that the original design is for an 8TB Seagate hard drive.
The 3cm cooling fan is 12V.
After testing, this fan placement works well for cooling. Then, make sure to adjust certain parts in the image for better airflow.
Once the fan is installed, we tested it, and the 12V fan had a lot of vibration. While the airflow is strong, the noise from the fan is also noticeable.
If you're sensitive to the noise, you can trim this section.
The power is directly supplied from the USB port with 5V. After the voltage drops, the noise decreases, and after further testing, the airflow is acceptable.
All done! With the cooling fan, the temperature drops by 8°C compared to without. The HC320 is an enterprise-grade hard drive, and when writing data, it can reach 60°C. After the fan was added, the temperature dropped significantly. If you're using it for storage, stable and low temperatures are exactly what you need.