What to do if my external hard disc Seagate Expansion Portable Drive 1 TB can't and doesn't appear in DEVICE MANAGER, MY COMPUTER, ANYWHERE?

When I plug in my ext. Seagate disc, it starts making peeping sounds and the blue light signal is just visible without blinking, so it means that the problem must be definitely in software. Then, after few seconds, the small light signal starts to blink and at that moment, my computer can't see the disc at all. During first few seconds after plugging in my computer is able to see my disc and it's written installing. I could normally use my disc in past without any problems. From day to day it stopped working in that way that I can't see my disc.

What do you advise me to do? How could I repair it myself? I am not going to pay a lot of money for reparation and, what is more important for me that I've got files on disc that I need a lot.
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Benjamin VoglarIT ProCommented:
Did you try to plug it to another computer?
I would suggest you to replace the USB cable.
It looks as if it doesn't get enough power. Does the disk have an external power source, or does it only get it from the USB port? If it only gets power from the USB port, are you using a cable which plugs into 2 ports, and have you made sure both plugs are plugged into the PC? If it gets power from an external power adapter, have you made sure that is still OK?

If the power adapter is bad, and you still have warranty, get a warranty replacement.
andreasSystem AdminCommented:
You could remove the drive from its enclosure and connect it directly to an s-ata port and power plug in your PC. If its still not recognized then the disk is defective.

Peeping sounds also could indicate a problem with the harddrive itself.

If the drive is really broken and the files are important for you you need to contact a professional recovery lab. Repairing/tinkering with the disk to make it work again usually causes more harm and makes it even more diccifult/expensive to recover files. You may even destroy files and render them unrecoverable whilst tinkering with the disk.

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I wouldn't remove the disk from it's enclosure if you still have warranty, as that will void it.
andreasSystem AdminCommented:
correct, but if he wants to claim warranty, he may need to say good bye to his files. if the problem is not solvable without removing the disk. Usually manufacturer will not recover files from warranty returns.
So where is the problem? I don't see any issue in saying good-bye to the files, as you always have backups of all your important data. If for some unknown and strange reason you shouldn't have backups, then send the disk to a recovery agency. They can open the enclosure without voiding the warranty, so after they have recovered the data you can still claim warranty for the hardware at least (provided it wasn't the user who caused the disk to fail).
noxchoGlobal Support CoordinatorCommented:
Rindi, external drives are often used to store backups and not everyone takes backups of backups :)
As suggested above I would try this drive first on another PC.
If it already holds backups, then you still have the originals somewhere else, besides you never have only one backup. I still fail to see any problem. Just get a new disk and backup again.
Rindi, the original poster wrote, "what is more important for me that I've got files on disc that I need a lot".   So, while they should have backed up, obviously, they didn't.
God's child -  how is it going?  do you use an usb3 port or usb 2 one?
what model seagate is it ?

try also to open disk manager, to see if the drive shows there, and has a drive letter
to summarise your options :
1- try another USB port and cable (lso front and back of pc)
2-test on another PC
3-test if the prots work ok with other usb devices
Gods_childAuthor Commented:
Guys, thank you for all comments and suggestions, but unfortunately, I just killed my disk yesterday. It wasn't a power problem or problem just with my laptop that couldn't provide enough power for disk. The problem was that the disk had been defective. I didn't want to pay a lot of money to any recovery agency so I checked some Youtube "how to" videos and I opened it myself. Everything went right until I didn't have an appropriate screwdriver to release magnetic disk in order to set back the reader of disk into its position. Now my laptop can recognize my disk, but I can't open it, it needs to be formatted, so I guess I have just killed it and I have no idea if there exists a way how to get data from disk. My mistake!
andreasSystem AdminCommented:
Working on an open recent HDD will not work. small dust particles will soon damage the magnetic surface and the read/write heads.

To work on an open HDD you need a clean-room and proper tools. Dust particles, fingerprints, small fibers from clothing, all this will render your disk completely defective.

There is no way to get the files back by yourself, in thuis case only professional recovery labs can help.
>>  Everything went right until I didn't have an appropriate screwdriver to release magnetic disk in order to set back the reader of disk into its position   <<   can you post the link for thet youtube, so we know what you talk about?
noxchoGlobal Support CoordinatorCommented:
So you identified it was a stuck head of the reader? If you try to format it - will it fail as well?
andreasSystem AdminCommented:
Why you suggest to try to format, as he still wants to try to recover his files this will make it harder/impossible to recover files.

A disk imager or recovery software would have been the proper tool to test if the disk will at least try to do something.
But as it seemed he already opened it up and stuck wile trying to loosen some screws INSIDE the HDD.

If he indeed only opend up the external case with the USB adapter logic and the power connections then he might still have chances.

Try to connect the HDD which you have removed from the external case to a PC directly and try to run recovery tools like
Runtime Software Get Data Back NTFS/Fat depending on what filesystem you were using before.
Gods_childAuthor Commented:
After scanning test of the disk, it is damaged for 100%. Extremely bad! But anyway, I want to search for such case and try to go to some specialist, maybe they can do something. For others, yes when you have got beeping sound after starting up your disk, it is usually going to be the problem that head reader is set on the splatter and it can't start to spin that equals your disk will not be detected by your computer. But I didn't loosen the screw on splatters of my disk and so, I damaged completely my disk. That's all.
you can ask for policy and fees at gillware : http://www.gillware.com/      
they have reasonable prices, and good service
noxchoGlobal Support CoordinatorCommented:
If the plates are damaged in any way then you do not have much hope. Just accept the loss and take this case as a lesson.
But if you have money and time - check if you get any local data recovery service. Gillware is one which is well known but there are always small companies which do the same.
Recovery agencies aren't cheap. Depending on the damage you have inflicted on the disk, it will get even more expensive. Unless you have hundreds or even more dollars to spare (you said in your Question you wanted to keep it cheap), just get rid of the disk, or hang it up on your wall to look at, or display it in a shelf, and then get a new one (or better, more than one so you can properly setup backups).
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