I purchased maybe 4-6 months ago a Toshiba E05A100SBU3EW_C STOR.E ART 4 1TB USB 3.0 2.5 inch Hard Drive - Black from amazon and one day it just suddenly stopped working and I was wondering if any one knew how to get it working again on my mac or windows machine, please as it has a lot of important data
The USB ports of your Mac don’t provide enough power to the HDD.
The HDD supports high speed USB 3.0 port. This means that is needs about 900mA
The common USB 2.0 ports provide max 500mA so this is not enough…
In such case you need to connect the HDD to two USB ports using an Y usb cable…
There are two possibilities: either its power issue as mentioned by Paolo30 or it’s a HDD malfunction.
I think you should try to connect this HDD to two USB ports or to an USB hub which provides enough power to the USB HDD.
Ensure that 900mA are provided to this HDD…if this does not solve the problem, it can be possible that your HDD malfunctions.