I have an Adata 2TB HC 660 slim external hard drive which I have been using for some years. It was mainly used as an extension for my laptop SSD, so it has spent most of the time on the desk. I was moving some data from my laptop when the transfer speed became zero. I tried re-plugging the drive, I heard the plugging in sound but nothing appeared, I checked the disk management but it showed nothing. Further more I plugged in another portable HDD (Adata 1TB) and I didn't even hear the plugging in sound. However when I unplugged the 2 TB Adata, the 1 TB worked just fine. I attributed this to lack of power since I was using my laptop, so I tried it on my PC. Although it didn't stopped my 1TB HDD from working, but it had the same problem with the 2TB. The following must be noted that:
- the company casing has no port for AC input
- my 2TB drive is around 90% full
- 2TB was working just fine earlier when I transferred data into it from another laptop. But using that same laptop after wards wasn't fruitful either.