my computer don't see external hard drive

When I plug in first time my laptop find new hardware but not visible in computer.I check in manager and was visible but not visible in my computer.I restart computer and nothing happen when I plug in.I try all usb ports and nothing.I plug in to usb and nothing.Light on hard drive is on and hard drive is spinning.

I reinstall fresh copy of W7 64 bit.I plug in and laptop find hardware and say that is ready to use but not visible in my computer and I can't do nothing with this hdd.

I try find solution on line and I see that a lot of peoples have this type of problems.

 

Wel you open the 'your computer' icon on your desktop and can't find the storage device, it could mean you need to instal some kind of driver for it, which I highly doubt but try looking on the internet, or a disc if you got one with your drive.
Otherwise, just click on the icon again and there should be 2 lines of blue text:
The first one should be saying: Hard disk Drives, normaly your external drive should be visible there.
The second one should be saying: Devices with removable storage.
Normaly you should see your dvd reader there. if you don't see nothing it means you minimized it and you should double click on that blue line of text and see what pops up.

 

this is what I see
dynamic invalid

 

OK,I click on that red arrow and chose " convert to basic"
I format and finally visible but can't delete those two small volumes

diskpart can't do nothing

 

I ment left click on the computer icon (not rightclick and chose computer management)

 

Is that an old internal drive you are using?
Looks like one...

You can delete the partitions and format it - BUT this will remove any data - also any recovery partitions...

 

yes,it's used 2.5 internal and I put this into enclosure which I bought at local pc store.

how to delete and format?

 

Provided you do NOT want to keep the recovery partition - right click the partition and delete it.

If you delete all 3 you get unallocated space - then you can format it and create a single partition.

 

i am not able to delete those 2 small
when I right click I see only small HELP box
I can delete only 450GB

I try diskpart and nothing.I had same problem when this hdd was in laptop
not able to delete these 2 small ones

 

That would seem rather strange...

hmm... well, overkill, you could try to place in in a laptop and then run DBAN on it... (beware, that will wipe out everything - so if you have multiple internal drives, remove all to make sure you don't kill either one by mistake)

 

The easiest way?

Put the HD in question into the notebook's main (only) internal SATA slot.

Start Win 7 Installer.

Click Advanced and select the small partitions you do not want - select delete. Repeat until no partitions remain. Shut down computer.

Switch HD's. Done!

 

You say diskpart and nothing. Since you don't way what commands you are running did you try:

1. Plug the drive into your PC.

2. Open a command prompt as administrator (Right click, Open as Admin, or Ctrl+Shift+Click)

3. Get the drive number by typing:
diskpart
list disk (See what the disk number is for your external disk)

4. Format the drive by typing:
select disk X (Where X is the disk number found above in list disk)
clean (or “clean all” this should totally erase the External HD & delete all partitions)
create partition primary
select partition 1
format fs=NTFS /quick
assign (this will automatically assign the next available drive letter)
exit (this exits diskpart)
exit

 

Bra try another USB port on your computer or someone elses. The drive needs more power.