Likely a power or thermal bottleneck. Since small files work fine, its unlikely the drive is failing. It's more likely a connection or heat issue during sustained high-load transfers.
Quick check:
Power Stability: If you're on a desktop, plug the drive directly into the rear (motherboard) ports.
Front-panel ports often suffer from voltage drops during long 50GB+ transfers.
Thermal Throttling: Sustained transfers generate significant heat. Ensure the drive has plenty of airflow.
If it has a protective sleeve, remove it temporarily.
USB Power Settings: In Windows, go to Power Options > Change plan settings > Advanced settings and
disable "USB selective suspend." This prevents the OS from "napping" the port mid-transfer.
Cable Check: If you have a shorter, highquality cable, try it.
Long cables often struggle with signal integrity during massive data moves.
Try the rear ports first that fixes this 90% of the time.
