Question about Buffalo Technology (USA), INC. - 500GB DRIVESTATION EXTERNAL USB 500 GB Hard Drive
I couldn't open my 470 GB data from my external drive.
This indicates a physical failure with the drive. Mostly too many bad sectors. Good advice here is to shut it down, and not try to work with it any longer, as what ever you are doing without professional tools will only make the drive fail faster, and ultimately permanently.
Once a platter has too many bad sectors, you can do nothing more with it. Bad sectors cannot be repaired.
This link can help you learn a little bit more about failing drives and errors, but in your case you will need professional tool to safely get your data back.
Posted on Mar 21, 2014
Sometimes this can be an indication your drive is beginning to fail. I would extract the drive from it's shell to rule out the shell/caddie as the problem. Then run diagnostics on the drive using Seatools:
Posted on Mar 21, 2014
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Posted on Jan 02, 2017
Some of the externals have mapping issues in Windows. Although the TB shows in devices, you may need to remap it (right click on My Computer for mapping options) and in some cases, changing the drive letter will fix your problem. There's really no 1 definitive solution for these. If you're unable to fix the problem by remapping or changing the drive letter, you can partition the drive to recover your data. As far as the slow transfer rate goes, almost all externals are formatted in FAT. This has issues of its own with safely removing devices and slow transfer rates. I prefer to format my externals and flash drives in NTSF for more reliability. Best of luck.
Posted on Jul 21, 2009
Tips for a great answer:
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The message "The Request Could Not Be Performed Because of an I/O Device Error" appears when Windows is unable to read the data on a storage device.
If this error message appears when attempting to access the files on an input/output
(I/O or IO) device, such as an external hard drive, the file system on the drive could be damaged, the drive could be infected with a virus or the data connector inside the device enclosure could have come loose.
If troubleshooting the drive fails to fix the IO device error, formatting the drive might repair the device.
Connect the external hard drive to the computer.
Run an antivirus program.
Click the "Scan" tab or button, then click "Custom."
Uncheck all items in the list except for the drive letter assigned to the external drive.
Click "OK." Click "Scan" or "Scan Now" to run a virus scan on the hard drive.
Quarantine or remove any infections the virus scanner detects.
Click "Start." Input "cmd.exe" into the search field.
Press "Enter" to open Command Prompt. Input "chkdsk <drive>: /f /r" into Command Prompt.
Replace "<drive>" with the letter assigned to your external hard drive.
Press "Enter" to run CheckDisk on the drive.
CheckDisk will search for and repair detected errors or bad sectors.
Burn the files on the external hard drive to a set of DVDs or move the files to another drive, if possible.
If the IO device error reappears when attempting to move the files, disconnect the external hard drive from the computer.
Remove the power adapter from the drive.
Check the documentation included with the drive for instructions to take the drive apart.
If no instructions are available, contact the manufacturer for instructions or find out if disassembling the drive will void the drive's warranty.
Remove the screws securing the faceplate to the drive or from the edge of the enclosure. Insert the edge of a small, flathead screwdriver in between either side of the enclosure to wedge both sides apart.
Check the connections to the drive.
Confirm that the IDE or SATA interface is plugged into the back of the drive.
Reassemble the external hard drive, reconnect the power adapter and reconnect the drive to the PC.
Attempt to access the files on the drive.
If the IO device error reappears, return to Command Prompt. Input "format /fs:fat32 <drive>:" into the command-line prompt.
Replace "<drive>" with the letter assigned to the external hard drive.
Press "y" when the message "Proceed with Format (Y/N)?" appears.
The process will format the drive, erasing all data on the disk.
If the drive still fails to function after format, you will need to replace the drive.
Hope this helps
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