My Samsung 250 GB portable HDD is not recognised now. It was working for last 2 years without any problem. Recently I found my PC infected by "WIN32" & Torjan viruses. It may be the reason. But I tried with other machine which are very much protected by Norton antivirus. - Physically checked that power is coming and observed the disk is moving also. But it is not showing in my computer.

get a copy of linux puppy and boot from cd while your external drive plugged in, it should recognise this under linux, then get what files you need and transfer to usb drive and reformatt the drive, I hope this helps

Hi Good day!! Check the cable maybe your cable has been damage..

Please get the correct driver here : www.printcountry.com/drivers.asp
www.opendrivers.com/.../printers-free-driver-download.html
www.driversdown.com/driverslist/r_4_1.shtml
Regards, Jay__ikfuh32

Have a look at this article on external HDD troubleshooting. Helped me out in the past:
http://www.devicedriverfinder.com/blog/device-errors/external-hard-drive-troubleshooting

Good day!

Did you try to use another IDE cables?If not,please find some IDEs there and try it.You can also use another PC and try the said HDD just to recognize it.or try to swap it in the IDE1. See if its work.

mastergani

CHANGE USB CASING.

Try connecting this to another PC, see if the files are shown then. One drastic solution is to quick format the drive then use a file recovery utility to recover a format. BEFORE doing this as a LAST resort, if the device is recognised in Explorer on your comp or another machine, run a disc check utility such as HDD tune or similar and see if the drive is throwing up a RSA error or has bad sectors. If you Can access your data in the meantime, I'd pull it off quickly. Only go for the reformat / recover option as a last resort though..

windows xp and win 7 drops out the drivers as it is no ;longer supported by Microsoft

I think I know which limit you have hit then. The maximum size for any single file on a FAT32 system is 2^32-1 bytes which is 1 byte less than 4GB (binary version of the number, not decimal) or 4,294,967,295 bytes.

You must be logged on as an administrator to perform these steps. Before you begin, note that the FAT32 file system has size limitations. In this version of Windows, you cannot create a FAT32 partition greater than 32 gigabytes (GB). In addition, you cannot store a file larger than 4 GB on a FAT32 partition. For more information, see Comparing NTFS and FAT file systems.
Converting a hard disk partition or volume from NTFS to FAT32 requires that you reformat the partition, which will destroy any data on it. Be sure to back up any data you want to keep before you begin.