My ps3 120gb slim, does not recognise my multimedia hard drive, it a cyclone primus 2tb.

Can you give more information ?

https://www.youtube.com/watch?v=eUhh4eMJEow
http://www.eetimes.com/author.asp?doc_id=1325710
https://www.quora.com/How-do-I-connect-a-1TB-hard-disk-with-an-Android-smart-phone

You can download "Seagate Dashboard" and it has backup software. I have it and it works great.
Hop this helps

Slow & Carefully

Copy from which origin (the cloud, a smartphone, a Windows PC, a Netbook, an Android tablet, a NAS, an Apple device, etc...) ?

Before connecting anything to an USB port you need to install the software for the device. Then you can connect it.
But when you have an old laptop it could be it can't handle the 2 TB.
First install the software that came with the drive. Then see if the laptop can handle the 2TB.

From this and several other posts you made on this device (I assume you are the same Anonymous poster), it appears you do not have a formatted hard drive installed in the unit, or you didn't know the computer is treating it as an external drive (even if it calls it an "unknown" USB device. Your computer is looking for the file system in the enclosure. The directions for finding the unit from a Windows computer (written for the mkv, not the mkv 2, but they would probably work the same) are given in the review article linked below. Note: if you don't find any "Unallocated" disk, look in "My Computer" for a drive that isn't your internal hard drive or other usual device. Probably all you have to do is save your media files to this drive and they will be available to play on your A/V system.

Sumvision Cyclone MKV Primus 1080HD media player

Yes. Very expensive to get data. Most people take the loss.

Assuming you are using a Windows operating system, you can just plug it into your computer's USB ports, and the computer will recognise it as another hard drive.

Instructions:
Double-click on 'My Computer' and take note of what drive letters are there (C:, D:, etc.) before you plug in the Seagate Freeagent.
Plug in the Seagate Freeagent. You'll see the new drive, likely E: or F: (depending on what is already there before you plugged in the Seagate Freeagent)
Double-click on the new drive, and it'll open up and you'll see the files stored on that drive. You can drag and drop files and save to this drive like any other folder on your computer.

i am having the same problem.

can anyone explain.

Power tries to turn on but fails to come up with screen that says HELLO.

It just flickers on for a second and then powers down straight away.