I don't know if it is recomended to vaccum off dust inside a computer.
You have to be very careful with electrostatic discharge from your body and/or the brush you use to wipe out the dust. ESD can...

This could be a bad drive, defective AC power adapter, bad usb cables or there may not be enough power being supplied on the usb ports.

There is not a best hard drive company. They all try hard to please customers and outperform each another. If one makes small improvements on their drives, they patent it and the other companies...