I've been using my external hard drive regularly, and safely remove it (<--- WOW :lol
...
Then one night, I safely removed it, and slept. In the morning, it suddenly didn't work.
I tried searching all solutions for this, but it always said that I needed to format before I can use it.
Then I noticed that before it was Drive E:/ now it is Drive F:/
Then, I tried quick formatting. It said formatting failed. I checked drive manager and it said my HDD was healthy, and I tried formatting it (the long way), and it also failed.
I used command prompt, and it also failed.
Can you please help me solve my problem? And also, can you suggest a software for restoring lost data?

Then one night, I safely removed it, and slept. In the morning, it suddenly didn't work.
I tried searching all solutions for this, but it always said that I needed to format before I can use it.
Then I noticed that before it was Drive E:/ now it is Drive F:/
Then, I tried quick formatting. It said formatting failed. I checked drive manager and it said my HDD was healthy, and I tried formatting it (the long way), and it also failed.
I used command prompt, and it also failed.
Can you please help me solve my problem? And also, can you suggest a software for restoring lost data?