External HDD Recognized (DevMan) but Not Detected (MyComp)

Registration date
Saturday April 15, 2017
Last seen
April 15, 2017

My external USB HDD did't show up in 'My Computer' but it recognized in Device Manager. I also did check 'Computer Management' and DISKPART in Command Prompt, but still not detected.

It was 2 week since the last time i using it. Back then i encountered some problem with this ext HDD, but i can fix it. I used the same method like what i did back then, but nothing happened. i also tried to uninstall and then reinstall it driver, but still same (recognized but not detected).

Besides, seems like this HDD made some issue to my computer. I mean every time i plug it in before my Optical Mouse, i couldn't use my OMouse to move the cursor, while my touchpad did. It also take a long time to boot whenever i restart my notebook while ext HDD plugged.

- LED notification always on
- HDD doesn't make any (disturbing) noise, unless when i put it close to my ear. It ticking about 2 counts per second, is it normal?
- It recognized since there is (safely removable) notification in my taskbar, even it doesn't like it used to.
- My notebook keep recognized it as 'Seagate Expansion SCSI Disk Space' (in Device Manager), even after I uninstalled its driver.
- Optical Mouse and any other hardware which use USB port cannot work unless it plugged before HDD.
- Take much longer time to boot when HDD plugged.

I've used this HDD for almost 2 years to put my project and personal data. I hope someone in this forum can help me to solve it since it really important. I apologize for my bad English and attitude, and also if it too long. Thank you!

Best Regards