Computer virus

All phenomena are always double-sidedness. There have a good side and bad side, positive side and negative side at the same time. Computers have brought tremendous convenience to our life. Whereas, computer virus destroy stored data in a flash. I had visited Chamonix Mont Blanc in the Alps. I took a lot of pictures there, and saved them on the computer. There are a lot of photos such as beautiful snow mountain, idyllic village scenery, people walking in a snowy field. There were hundreds of photos. By the way, suddenly, computer virus spread all over the nation. My computer changed black. And it did no longer operating. All photos and files which stored in computer were disappear at a moment. I don't know where they disappear. After that, I saved the data I needed on my computer's external hard drive. The capacity of the external hard disk is 1 terabyte, that is, 1000 gigabytes. Recently I bought another one more. According to technological advances, the prices are getting cheaper.

Hello, [이름]!
That\'s right! Everything has two sides: the good side and the bad side. Computers are of great help to humans but it has also its downside. You wrote an interesting and very logical composition again today. You did an amazing job!
Take care!
~T. Lynn
All phenomena are always double-sidedness.
>> All phenomena always have a double-side.
OR>> All phenomena have another side.
There have a good side and bad side, positive side and negative side at the same time.
>> There is a good side and a bad side or a positive side and a negative side at the same time.
Computers have brought tremendous convenience to our life.
>> Computers have brought tremendous convenience to our lives.
Whereas, computer virus destroy stored data in a flash.
>> correct!
I had visited Chamonix Mont Blanc in the Alps. I took a lot of pictures there, and saved them on the computer.
>> correct!
There are a lot of photos such as beautiful snow mountain, idyllic village scenery, people walking in a snowy field.
>> correct!
There were hundreds of photos.
>> correct!
By the way, suddenly, computer virus spread all over the nation.
>> Suddenly, a computer virus spread all over the nation.
My computer changed black. And it did no longer operating.
>> My computer changed to black and it did not operate/work anymore.
All photos and files which stored in computer were disappear at a moment.
>> All photos and files which were stored in my computer disappeared in a moment.
I don\'t know where they disappear.
>> I don\'t know where they disappeared.
After that, I saved the data I needed on my computer\'s external hard drive.
>> correct!
The capacity of the external hard disk is 1 terabyte, that is, 1000 gigabytes.
>> correct!
Recently I bought another one more.
>> Recently, I bought one more.
According to technological advances, the prices are getting cheaper.
>> Because of technological advances, the prices are getting cheaper.