You do seem skeptical and so I cannot explain it any better than this.
I am not attacking you or your story, maybe it is the difference in location and the way you explain things is just different than what I am used to.
I like to quote what you said as it is easier to kind of answer and have a conversation, for me anyway, and it shows I did read each part of your post. it is very hard to gauge the "tone" of typed text, so I try not to, and some answers can be misinterpreted as personal attack, or you may think I don't understand an issue, when in fact I do etc etc.
I took the time to answer as If you are getting victimised, it is not right, and if people here can spot a way to help, this type of conversation might bring it to be.
First of all I didn't know that a hard drive could be fixed by anyone other than the manufacturer, and second, I seen the damage to my drives in 2 computer stores in 2 different instances where my files and folders were destroyed.
The Mac tech is a friend of mine as well as a certified Apple Tech and he knows his stuff. Regarding the 3 drives that went, "Only one was attached to the computer and the other 2 were on the shelf so it was not electrical but something else. Those other 2 disks were tested in another computer and did not work there as well. One thing for sure is when I have the drive attached and running it will start to run on its own with lights indicating that the HD is being accessed. Little snitch has info pointing to "red activity" which means that files are leaving my drive.
Ok, not knowing a HDD can be fixed, well we are all new sometime, lets leave that be, no problem.
You don't hear "files and folders destroyed" term very often, it is a very strange term to use. Corrupted, deleted, wiped, stolen, encrypted maybe. Possibly that's what you mean, but it isn't obvious. I am not sure what would cause an unconnected drive to be damaged, aside from electricity. maybe your Mac friend might like to join the discussion, as it may be helpful from a techs point of view. I am having trouble figuring if you mean the electronics are fried or if the files and folders are damaged or both.
I and my wife have literally seen the mouse moving in the past on its own and actually open a file and at other times I have actually had to fight for position, indicating control of my mouse. The computer I am on right now is also plugged into the very same outlet so your electrical theory is incorrect. Furthermore, I am a contractor and have much knowledge about the electrical here as I did it myself and it was inspected. The last computer that I had destroyed was so far damaged that 2 techs came to the same conclusion in a very short period of time "Man Made Damage" These techs know their stuff and I have used them much. The only thing of note in regards to this situation is that I have installed Yosemite the day before but that does not explain why "only my 3 main working drives" which I use every day are no longer working.
So after you saw the mouse moving, what was the course of action?
The electrical idea was just that, not a theory. I have seen many instances of people think they have been hacked or malware have taken over the system, and in some cases they have, but in others it was bad power supplies, bad drivers, installed programs crashing, windows corruption etc etc. All I am saying is keep an open mind. Until the malware is identified, or the hacking is verified, it is also just a theory.
Installing Yosamite may or may not be relevant, again we don't know, but a huge system change such as this is something to note.. one of the first questions in IT Tech (Which I have been for around 16 years) is "what have you changed recently?".
The biggest test is that I removed the pcb's from the 3 HD's and plugged them into the Sata Caddy slot............. and the very same thing happen as when I placed the drive into the slot........."It turned the Drive off" indicating to me that the board is shot. All of the above does not explain how 2 of the drive which were not plugged in are also not working all of a sudden.
It is worrying that you are performing these sorts of tests when you previously displayed little knowledge of PCBs and Hard disks. It is not "the biggest test" it is "a" test. The cable or caddy could be faulty and this may make any drive seem bad, or some of them, or damage drives. It is an unknown. The 2 drives HAD to be plugged in at some stage, otherwise you wouldn't know if they were working or not. Again, the culprit does not look like a hacker or malware to me.
2.) The racial issue is real and unless you know about it,,,,,,,,, let it be. It would be best!
I see no problem in discussing it, if it is a factor, then this must be identified for any solution to be forthcoming. I am old enough to have seen racism, and while I don't know your exact circumstance, if this is the case, then I am sorry for you, and I hope it can be resolved. I would urge you to contact whatever help you have available, authorities, other groups.. It needs to be stopped. While you are in the process of getting the seagates looked at, some advice is:
1. know your environment. This is the single most important factor in Information Security. Hackers will exploit things you have overlooked or might not know about. Tame a look at your IT setup and I would suggest some diagrams to map out your hardware, software, network incomings and outgoings. think of what software is talking to outside, updates, any communication software etc. and verify configuration.
If your network seems too complex for this, Then simplify it. It sounds a little like you have a bit on your plate, devices everywhere.
think of some networks such as the recent Saudi Aramco where they had 30,000 workstations wiped overnight... they were up and running in about a week.
Make syure all your devices have the latest firmware, especially the Linksys e4500. If no updates have been available for around 9 months, I would be wary of even using a device that doesn't get updated.. think Heartbleed, Shellshock, and what is it now.. poodle or something?
2. Try and find evidence of malware or these "scripts". Verify your power supply is fine, as you are not certain:
All of the above were either completely damaged beyond repair or electronically overwritten with some kind of script
In computing, you cannot make one assumption based on one other. Just because you cannot find an electrical issue does not mean a hacker. There are many possibilities. You may need someone to look over your hardware.
The last computer that I had destroyed was so far damaged that 2 techs came to the same conclusion in a very short period of time "Man Made Damage" These techs know their stuff and I have used them much.
I have seen many Techs appear to "know their stuff" Sadly not always the case. Some are very convincing. What did they think was the cause? what did they investigate? "Someone did something" is not a verdict in my opinion.
Again, I am very critical of this whole situation being hacker related.
For what it is worth this comes from growing up around the hacker scene and working in IT and computer security.
can you elaborate how the 27" iMac was "lost", as it appears to be just a hard disk as the fault?
Again, I am not being argumentative, just trying to draw out all the facts from opinions and emotion.