I am having issues with Seagate Backup Plus Drive. MBP stopped recognizing the disk a few weeks ago. I could go on Activity Monitor and quit a process that would not let me mount the disc (called chkdisk or something). Once that process quit, a popup would show up saying that my drive is not repairable and only read only. So, I got another external disk to copy all my data from the old one to the new one. Once I did that, I formatted the Seagate Backup Plus Drive (old drive) to OSX Journaled format. I copied all my data back into it, and activated Time Machine on this old disk. Everything was working like usual for a few hours, by now. Since everything was working fine, I wiped the data off the new disk (using Disk Utility and stage 2 cleaning) and returned it to my friend. This morning, the old disk was not being recognized in the computer and Time Machine was giving the error could not find disk. So, I switched off my MBP (13" 2012 model) and connected the disk again. The disk spun up, clicked around 8-10 times and then spun down and nothing happened. Everytime I plugged it back in, same thing happened. Things I have done: 1. Put it in a freezer bag and tried again. No luck. 2. Pulled out the hard drive from the enclosure and opened it up to see if the headers are stuck on the platter. They are not. 3. Played around with two different USB ports, USB cables, power supply. No luck. Power is coming straight from the wall and USB is being plugged right to the MBP. Is there any way I can recover data from this old disk via software? Retail technicians are asking quite a bit to fix this. Will Disk Drill help? Will Data Rescue help? Also, I am trying to use my friend's disk to salvage my data, but no luck so far. I have used Disk Drill (not the Pro version) and Seagate File Recovery app to see what comes up, but so far nothing has showed up. So, I think that stage 2 cleaning wiped clean the new drive. Is there any way, other than taking to a data recovery specialist, I can get to my data?