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#11
as you already have a lot of help from good people, i will stay out of this one.
I only react to your words (i won't lose any data, right ?)
Always make backup on your personal data as photos and documents etc.
Even if you wont lose your data if you follow their advice's... your computer or harddrive can die everything from a day after you bought it, to 30years from now. Some times when it break you don't get a warning in advance and it can happen at anytime between a day and 30years.
So always have backup on important stuff.
also when doing stuff that should not go wrong, it still can go wrong. and is called "Murphy's law" Murphy's law - Wikipedia
so when doing stuff.. always backup first. just an friendly advice.
Good luck.