USB SSD drive disconnects mid-copy?

Your drive may need more power than some specific usb powers can provide.

Here's some more info that you could have found.
USB SSD drives that disconnect during data transfers are usually caused by insufficient power, overheating, or faulty cables/ports. Immediate fixes include using a shorter cable, connecting directly to motherboard ports (rear USB), disabling USB selective suspend in power settings, and checking for overheating.
Common Fixes to Try:
Change Cables/Ports: Use a shorter, high-quality cable, and switch to a direct motherboard USB port, preferably USB 3.0 or higher.
Fix Power Issues: Turn off "USB selective suspend" in Windows Power Options to prevent the drive from sleeping.
Address Overheating: If transferring massive files, the drive may be getting too hot; allow it to cool down or use a small external fan.
Run Diagnostics: Use Windows built-in disk check to repair potential file system errors or bad sectors that cause crashes.
Use Powered Hub: If using a USB hub, switch to a powered one to ensure the drive gets enough power.
Check Drive Health: Run tools to check if the drive is failing or experiencing data corruption.
Why This Happens:
Power Hunger: The SSD might draw more power than the port can supply during heavy writes.
Sleep Mode: The computer cuts power to the USB port to save energy.
Thermal Protection: SSDs may shut down if they exceed safe operating temperatures.

Dndbf
February 2026