Broken USB connection Lacie FA Porsche

Try changing the cable that might work .

You can only hope that the drop has dislodged the drive from the internal connections in the case and has not damaged the drive. You'll have to figure out how to get the case apart.

it is hard to say exactly what's wrong with but I would say that is probably that the usb (if it's a usb disk) isn't working on the drive side. It has power and disk are probably working if you can hear the sound of them. But since the usb port which connects it to PC isn't working it doesn't show up in device manager.

That would be my guess based on what you wrote here

the interphase between the raw drive and the usb cable is faulty or blown up.
use the raw drive from the casing to power it directly to pc it would start working

Try connecting the Lacie to another computer, if it doesn't work then the hard disk may need to be formatted using Disk Manager. I suggest you format as a primary partition in FAT32.
If it doesn't work then it is possible that the hard drive in the Lacie has failed.
To test the hard drive, remove it and connect it to an USB hard drive adapter and connect it to a working computer's USB port. If it deosn't detect it as an external drive and you connot open folders and files then it is faulty.
You can install a new hard drive in the Lacie and then format in FAT32
There are companies that can recover data from faulty hard drives BUT it will cost you an arm and a leg for their services.

Sounds like the hard drive in the Lacie has fauled.
To test the hard drive, remove it and connect it to an USB hard drive adapter and connect it to a working computer's USB port. If it deosn't detect it as an external drive and you connot open folders and files then it is faulty.
You can install a new hard drive in the Lacie and then format in FAT32.

Does your drive make any unusual sounds like any of these: http://datacent.com/hard_drive_sounds.php ?
If yes then you got a problem - it's something mechanical with the heads.
If it sounds normal or doesn't spin up at all - try to connect it to another computer and if still no go - remove the internal drive from enclosure and connect directly to PC via SATA port.

Does your drive make any unusual sounds like any of these: http://datacent.com/hard_drive_sounds.php ?
If yes then you got a problem - it's something mechanical with the heads and it's not something you can fix by yourself.
If it sounds normal or doesn't spin up at all - try to connect it to another computer and if still no go - remove the internal drive from enclosure and connect directly to PC via SATA port.

Try to remove the internal drive from enclosure and connect it directly to the PC.
Another imporant thing - does it make any new sounds similar to any from this page: http://datacent.com/hard_drive_sounds.php ?

I was able to acces the hard drive again, by replacing the cable that goes from the hard drive to the computer. Once I did that, there was no problem with the connection.

However, some of the data seems to be corrupted or lost. Still trying to sort that out, but I did retrieve most of it.