Computer stopped seeing the external drive 500MB Canvio USB3

Hi
Had a slight accident with my external device while using a backup program, pressed clone not backup from C: partition to the external drive. I realised after i did it, so cancelled the operation after about 1%. Noe the drive (E will not appear on this computer or any other. Can i recover or do i have to reformat the external drive and if so how do i reformat it? Thank you.
Stuart

Check if the external USB HDD appears within the Disk Management.
1. Go to Control Panel → Computer Management
2. In the left pane, under Storage, click Disk Management.
3. Here you should see the different HDDs / partitions.
4. Select the external USB HDD
5. Right-click the volume that you want to format, and then click Format.
6. To format the volume with the default settings, in the Format dialog box, click OK, and then click OK again.
7. click Finish.
More info in MS knowledge website
http://windows.microsoft.com/en-us/w...disk-partition

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Don't see the external drive

So I just installed Tiger. I still have OS 9 with Classic.
Two problems but I will separate them and post only one here.
1) I have an external drive, OWC Neptune firewire 300 GB with 20 folders or so. But now, after installing Tiger, when I click on the external drive (the icon is visible in OS X but not in Classic) I see only the Hard Disk Speed Tools (1 folder with 7 files that are technical). I don't see any of my folders and files I saved-- about 1 GB more or less)
Please tell me it's not gone !
Why is it that the external drive icon is visible in OS X but not in Classic ?
Also I tried to see how much GB I have on the external drive but it doesn't give me any indication. When I click ->Get info it shows size : 3.2 MB

Hi eew, Thank you for your answer.
When Classic is running, OS X is controlling the computer, and your access to external drives is the same as when Classic is turned off. Are you confusing Classic operation in OS X with booting the computer into OS 9 (OS X is not running at all)? The difference may seem to be purely a matter of semantics, but it isn't.
1) No, when I turn on my computer it runs on OS X but Classic is also available (I turned the option to turn on both) but what appears on the screen is OS X.
2) > Are you confusing Classic operation in OS X with booting the computer into OS 9 (OS X is not running at all)?
I think I must put an OS 9 disk to boot into OS 9 don't I ? (I mean now that I have Tiger) The OS 9.0.4 disc is sitting comfy in a disc holder.
OS X is always present. When I shot down/wake up it is OS X. Then I see a file (I guess you can call it that) with the title "Classic starting up using "system folder" on "MacIntosh HD" and see the bar in progress. but nothing else. Then the Classic logo (the 9 in a square) is on the top bar. But the desktop doesn't show anything. If I click on the Classic logo and - -> "Start Classic" then, and only then do I see the familiar (and lovable) OS 9.2.2 on the blue background with the 2 faces loading.
3) >When you start your computer up in OS 9, you aren't using Classic you're running OS 9.
Hum, same as above, this is IF I put a OS 9 disc.
I installed OS X so I don't have OS 9 anymore to start. It start on Tiger with OS Classic also available.
So it is not completely true when they say in the installation option "Tiger will load (in single partition) on top of OS 9" since in fact it uses something new which is Classic. So I install OS X therefore OS 9 is not used anymore. And OS X contains a folder with this idea of a OS 9 substitute called Classic. It is not OS 9 and it is not OS X it's something in between.
4) >Under those circumstances, you won't be able to see any unpartitioned 300GB hard drive, internal or external, even if OS 9 drivers are installed.
Huh ? I installed the external drive when I still had OS 9.0.4 using the firewire connection.
The external drive came with a disc. The installation/set up said :
"Mac OS X : -Drivers not required. Proceed to hardware installation.
Mac OS 8.6-9.2.2- Firewire :
Insert the HDST CD (they mean by that the Hard Drive Speed Tools) and follow the instructions provided by the installer. You may need to install Apple's Firewire drivers, see the tech center for details"
I put the disc, followed the instructions and it says installation succesfull.
I did not install or open any other files /folders present on the external drive.
I saw the external drive logo on my desktop, I copied 20 files or so in it. I opened them to check if everything is OK before I trash the original so I don't understand you saying I won't be able to see any unpartitioned 300GB hard drive.
I didn't partition the external drive. I just installed it, open it and start copy files on it.
5) As for the
"You may need to install Apple's Firewire drivers, see the tech center for details"
I didn't see any warning about that and as I said, I started using the exter. drive. "You may need" and You must" are 2 different things. I assumed everything is OK since I used the external drive without problem. Wrong assumption ?
Days later I upgraded incremently to 9.2.2. (first 9.1 then 9.2 etc) and I still used the external drive to copy files hours before installing Tiger (to make room for Tiger).
Now I have Tiger.
And they said Mac OS X : -Drivers not required.
Beside I see it on OS X so that's not a problem
Actually I just tried right now to see if the external drive works by dragging a file on it and nothing happened. With OS 9.0.4 it immediately started to copy and I could see a bar showing me the progress.
I open the Drive and see that the Hard Disc Tool files folder (which has 7 files) has at least 3 files that has a connection with Classic: One is called "Integrity Classic" the other "Quick bench Classic" and another "Disk Defrag Classic HDST" Not sure if it has any connection with OS 9 Classic ? I guess yes because
When I click to see what it is I get a message
"Sorry, this program is not compatible with OS X or OS X Classic mode. Please reboot your computer into Mac OS 9 to run this software."
6) Will that solve the problem ? But if I reboot using OS 9 (the disk) wouldn't that jeopardize Tiger ? And a need to re-instal Tiger ? Maybe it won't erase it (or will it ?) but I will have to work (erggh!) on re-doing stuff ? That is why I want to install OS 9 on the external drive.
7) I'm thinking of installing OS 904 (from the disk that came with the computer 5 years ago) on the external drive (and then I will upgrade to 9.2.2 ) so I will have the real OS 9, the one I like, the one I'm used to (Not the pale Classic) and which I prefer to Tiger.
Is that a good idea ?
I will have Tiger on my internal HD and I will have OS on the external. Then I can forget about Classic which is confusing ; It is not OS 9 and it is not OS X it's something in between. (I will not bother to erase Classic or reinstall OS X alone or anything like that it's there, it will stay there but I will not use it.)
Although I will use Tiger 90% of the time.
I feel guilty for being so long.
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Computer stopped seeing the external drive 500MB Canvio USB3

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